diff --git a/.github/workflows/test-integrations-tasks.yml b/.github/workflows/test-integrations-tasks.yml
index 2483af4cc7..ca64893f7b 100644
--- a/.github/workflows/test-integrations-tasks.yml
+++ b/.github/workflows/test-integrations-tasks.yml
@@ -53,6 +53,10 @@ jobs:
       - name: Setup Test Env
         run: |
           uv sync
+      - name: Test apscheduler
+        run: |
+          set -x # print commands that are executed
+          ./scripts/runtox.sh "py${{ matrix.python-version }}-apscheduler"
       - name: Test arq
         run: |
           set -x # print commands that are executed
diff --git a/pyproject.toml b/pyproject.toml
index ff63660eec..655547e3ab 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -245,6 +245,10 @@ ignore_missing_imports = true
 module = "huey.*"
 ignore_missing_imports = true
 
+[[tool.mypy.overrides]]
+module = "apscheduler.*"
+ignore_missing_imports = true
+
 [[tool.mypy.overrides]]
 module = "openai.*"
 ignore_missing_imports = true
diff --git a/scripts/populate_tox/config.py b/scripts/populate_tox/config.py
index 9c891428bd..019d879aa5 100644
--- a/scripts/populate_tox/config.py
+++ b/scripts/populate_tox/config.py
@@ -39,6 +39,11 @@
         "python": ">=3.8",
         "num_versions": 2,
     },
+    "apscheduler": {
+        "package": "apscheduler",
+        # 4.x is a rewrite with a different API and isn't supported.
+        "include": "<4",
+    },
     "arq": {
         "package": "arq",
         "deps": {
diff --git a/scripts/populate_tox/package_dependencies.jsonl b/scripts/populate_tox/package_dependencies.jsonl
index cb895d4bdc..f09eccc460 100644
--- a/scripts/populate_tox/package_dependencies.jsonl
+++ b/scripts/populate_tox/package_dependencies.jsonl
@@ -553,3 +553,7 @@
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diff --git a/scripts/populate_tox/releases.jsonl b/scripts/populate_tox/releases.jsonl
index 7ba78b5883..46eca7065f 100644
--- a/scripts/populate_tox/releases.jsonl
+++ b/scripts/populate_tox/releases.jsonl
@@ -2,3 +2,7 @@
 {"info": {"classifiers": ["Development Status :: 5 - Production/Stable", "Intended Audience :: Developers", "License :: OSI Approved :: Apache Software License", "Natural Language :: English", "Programming Language :: Python", "Programming Language :: Python :: 3", "Programming Language :: Python :: 3.10", "Programming Language :: Python :: 3.11", "Programming Language :: Python :: 3.7", "Programming Language :: Python :: 3.8", "Programming Language :: Python :: 3.9"], "name": "boto3", "requires_python": ">= 3.7", "version": "1.24.96", "yanked": false}, "urls": [{"packagetype": "bdist_wheel", "filename": "boto3-1.24.96-py3-none-any.whl"}, {"packagetype": "sdist", "filename": "boto3-1.24.96.tar.gz"}]}
 {"info": {"classifiers": ["Development Status :: 5 - Production/Stable", "Intended Audience :: Developers", "License :: OSI Approved :: Apache Software License", "Natural Language :: English", "Programming Language :: Python", "Programming Language :: Python :: 3", "Programming Language :: Python :: 3 :: Only", "Programming Language :: Python :: 3.10", "Programming Language :: Python :: 3.11", "Programming Language :: Python :: 3.12", "Programming Language :: Python :: 3.13", "Programming Language :: Python :: 3.8", "Programming Language :: Python :: 3.9"], "name": "boto3", "requires_python": ">=3.8", "version": "1.35.99", "yanked": false}, "urls": [{"packagetype": "bdist_wheel", "filename": "boto3-1.35.99-py3-none-any.whl"}, {"packagetype": "sdist", "filename": "boto3-1.35.99.tar.gz"}]}
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+{"info": {"classifiers": ["Development Status :: 5 - Production/Stable", "Intended Audience :: Developers", "License :: OSI Approved :: MIT License", "Programming Language :: Python", "Programming Language :: Python :: 3 :: Only", "Programming Language :: Python :: 3.10", "Programming Language :: Python :: 3.11", "Programming Language :: Python :: 3.12", "Programming Language :: Python :: 3.13", "Programming Language :: Python :: 3.14", "Programming Language :: Python :: 3.8", "Programming Language :: Python :: 3.9"], "name": "APScheduler", "requires_python": ">=3.8", "version": "3.11.3", "yanked": false}, "urls": [{"packagetype": "bdist_wheel", "filename": "apscheduler-3.11.3-py3-none-any.whl"}, {"packagetype": "sdist", "filename": "apscheduler-3.11.3.tar.gz"}]}
+{"info": {"classifiers": ["Development Status :: 5 - Production/Stable", "Intended Audience :: Developers", "License :: OSI Approved :: MIT License", "Programming Language :: Python", "Programming Language :: Python :: 2.7", "Programming Language :: Python :: 3", "Programming Language :: Python :: 3.3", "Programming Language :: Python :: 3.4", "Programming Language :: Python :: 3.5", "Programming Language :: Python :: 3.6"], "name": "APScheduler", "requires_python": "", "version": "3.3.1", "yanked": false}, "urls": [{"packagetype": "bdist_wheel", "filename": "APScheduler-3.3.1-py2.py3-none-any.whl"}, {"packagetype": "sdist", "filename": "APScheduler-3.3.1.tar.gz"}]}
+{"info": {"classifiers": ["Development Status :: 5 - Production/Stable", "Intended Audience :: Developers", "License :: OSI Approved :: MIT License", "Programming Language :: Python", "Programming Language :: Python :: 2.7", "Programming Language :: Python :: 3", "Programming Language :: Python :: 3.4", "Programming Language :: Python :: 3.5", "Programming Language :: Python :: 3.6"], "name": "APScheduler", "requires_python": "", "version": "3.5.3", "yanked": false}, "urls": [{"packagetype": "bdist_wheel", "filename": "APScheduler-3.5.3-py2.py3-none-any.whl"}, {"packagetype": "sdist", "filename": "APScheduler-3.5.3.tar.gz"}]}
+{"info": {"classifiers": ["Development Status :: 5 - Production/Stable", "Intended Audience :: Developers", "License :: OSI Approved :: MIT License", "Programming Language :: Python", "Programming Language :: Python :: 2.7", "Programming Language :: Python :: 3", "Programming Language :: Python :: 3.5", "Programming Language :: Python :: 3.6", "Programming Language :: Python :: 3.7"], "name": "APScheduler", "requires_python": ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4", "version": "3.7.0", "yanked": false}, "urls": [{"packagetype": "bdist_wheel", "filename": "APScheduler-3.7.0-py2.py3-none-any.whl"}, {"packagetype": "sdist", "filename": "APScheduler-3.7.0.tar.gz"}]}
diff --git a/scripts/split_tox_gh_actions/split_tox_gh_actions.py b/scripts/split_tox_gh_actions/split_tox_gh_actions.py
index 60f294c911..75dbd331e7 100755
--- a/scripts/split_tox_gh_actions/split_tox_gh_actions.py
+++ b/scripts/split_tox_gh_actions/split_tox_gh_actions.py
@@ -136,6 +136,7 @@
         "requests",
     ],
     "Tasks": [
+        "apscheduler",
         "arq",
         "beam",
         "celery",
diff --git a/sentry_sdk/crons/utils.py b/sentry_sdk/crons/utils.py
index d5fa55e500..a7bd46578b 100644
--- a/sentry_sdk/crons/utils.py
+++ b/sentry_sdk/crons/utils.py
@@ -1,6 +1,8 @@
+from datetime import timedelta, timezone
 from typing import TYPE_CHECKING
 
 if TYPE_CHECKING:
+    from datetime import tzinfo
     from typing import Optional, Tuple
 
     from sentry_sdk._types import MonitorConfigSchedule, MonitorConfigScheduleUnit
@@ -27,3 +29,23 @@ def _get_interval_schedule(seconds: float) -> "Optional[MonitorConfigSchedule]":
                 "unit": unit,
             }
     return None
+
+
+def _get_timezone_name(tz: "tzinfo") -> "Optional[str]":
+    """
+    Return the IANA name of the timezone, or None if it has none.
+    """
+    # zoneinfo and pytz
+    name = getattr(tz, "key", None) or getattr(tz, "zone", None)
+    if isinstance(name, str):
+        # tzlocal's zone when it can't find the system's.
+        return None if name == "local" else name
+
+    if isinstance(tz, timezone):
+        offset = tz.utcoffset(None)
+        if offset % timedelta(hours=1):
+            return None
+        hours = offset // timedelta(hours=1)
+        return "Etc/GMT%+d" % -hours if hours else "UTC"
+
+    return None
diff --git a/sentry_sdk/integrations/__init__.py b/sentry_sdk/integrations/__init__.py
index e61365cc7f..2d4d056cb0 100644
--- a/sentry_sdk/integrations/__init__.py
+++ b/sentry_sdk/integrations/__init__.py
@@ -121,6 +121,7 @@ def iter_default_integrations(
     "aiohttp": (3, 4),
     "aiomysql": (0, 3, 0),
     "anthropic": (0, 16),
+    "apscheduler": (3, 3),
     "ariadne": (0, 20),
     "arq": (0, 23),
     "asyncpg": (0, 23),
diff --git a/sentry_sdk/integrations/apscheduler.py b/sentry_sdk/integrations/apscheduler.py
new file mode 100644
index 0000000000..265a11bbeb
--- /dev/null
+++ b/sentry_sdk/integrations/apscheduler.py
@@ -0,0 +1,374 @@
+import math
+import re
+import threading
+import weakref
+from functools import wraps
+from typing import TYPE_CHECKING
+
+import sentry_sdk
+from sentry_sdk.crons import MonitorStatus, capture_checkin
+from sentry_sdk.crons.utils import _get_interval_schedule, _get_timezone_name
+from sentry_sdk.integrations import DidNotEnable, Integration, _check_minimum_version
+from sentry_sdk.utils import (
+    capture_internal_exceptions,
+    logger,
+    match_regex_list,
+    now,
+    package_version,
+)
+
+if TYPE_CHECKING:
+    from typing import Any, Dict, List, Optional, Set, Tuple
+
+    from sentry_sdk._types import MonitorConfig
+
+try:
+    from apscheduler.events import (
+        EVENT_JOB_ERROR,
+        EVENT_JOB_EXECUTED,
+        EVENT_JOB_MISSED,
+    )
+    from apscheduler.executors.base import BaseExecutor, MaxInstancesReachedError
+    from apscheduler.triggers.cron import CronTrigger
+    from apscheduler.triggers.cron.expressions import (
+        AllExpression,
+        RangeExpression,
+    )
+    from apscheduler.triggers.interval import IntervalTrigger
+except ImportError:
+    raise DidNotEnable("APScheduler is not installed, or is not version 3.x")
+
+
+class APSchedulerIntegration(Integration):
+    identifier = "apscheduler"
+
+    def __init__(
+        self,
+        monitor_jobs: bool = False,
+        exclude_jobs: "Optional[List[str]]" = None,
+    ) -> None:
+        self.monitor_jobs = monitor_jobs
+        self.exclude_jobs = exclude_jobs
+
+    @staticmethod
+    def setup_once() -> None:
+        version = package_version("apscheduler")
+        _check_minimum_version(APSchedulerIntegration, version)
+        if version is not None and version[0] >= 4:
+            raise DidNotEnable("APScheduler 4 is not supported.")
+
+        _patch_submit_job()
+
+
+class _PendingCheckIn:
+    __slots__ = ("monitor_slug", "monitor_config", "start", "opened", "check_in_id")
+
+    def __init__(
+        self, monitor_slug: str, monitor_config: "MonitorConfig", start: float
+    ) -> None:
+        self.monitor_slug = monitor_slug
+        self.monitor_config = monitor_config
+        self.start = start
+        self.opened = False
+        self.check_in_id: "Optional[str]" = None
+
+    def open(self) -> None:
+        self.opened = True
+        self.check_in_id = capture_checkin(
+            monitor_slug=self.monitor_slug,
+            monitor_config=self.monitor_config,
+            status=MonitorStatus.IN_PROGRESS,
+        )
+
+
+class _CronsListener:
+    """
+    Tracks the check-ins of submitted runs and closes them.
+
+    Executors dispatch one `EVENT_JOB_EXECUTED`, `EVENT_JOB_ERROR` or
+    `EVENT_JOB_MISSED` per submitted run time, in the scheduler's process, for
+    every executor type.
+    """
+
+    MASK = EVENT_JOB_EXECUTED | EVENT_JOB_ERROR | EVENT_JOB_MISSED
+
+    def __init__(self) -> None:
+        self.lock = threading.Lock()
+        # Keyed by (job id, scheduled run time).
+        self.pending: "Dict[Tuple[str, Any], _PendingCheckIn]" = {}
+
+    def add(self, job_id: str, run_time: "Any", pending: "_PendingCheckIn") -> None:
+        with self.lock:
+            self.pending[(job_id, run_time)] = pending
+
+    def open(self, job_id: str, run_time: "Any") -> None:
+        # Under the lock, so `in_progress` is always sent before `finish`
+        # sends the closing check-in.
+        with self.lock:
+            pending = self.pending.get((job_id, run_time))
+            if pending is not None and not pending.opened:
+                pending.open()
+
+    def discard(self, job_id: str, run_time: "Any") -> None:
+        with self.lock:
+            self.pending.pop((job_id, run_time), None)
+
+    def finish(self, job_id: str, run_time: "Any", status: str) -> None:
+        with self.lock:
+            pending = self.pending.pop((job_id, run_time), None)
+        if pending is None:
+            return
+
+        # Synchronous executors finish the run before `submit_job` returns.
+        if not pending.opened:
+            pending.open()
+
+        capture_checkin(
+            monitor_slug=pending.monitor_slug,
+            monitor_config=pending.monitor_config,
+            check_in_id=pending.check_in_id,
+            duration=now() - pending.start,
+            status=status,
+        )
+
+    def __call__(self, event: "Any") -> None:
+        with capture_internal_exceptions():
+            status = (
+                MonitorStatus.OK
+                if event.code == EVENT_JOB_EXECUTED
+                else MonitorStatus.ERROR
+            )
+            self.finish(event.job_id, event.scheduled_run_time, status)
+
+
+# One listener per scheduler. Weak keys so we don't keep schedulers alive.
+_listeners: "weakref.WeakKeyDictionary[Any, _CronsListener]" = (
+    weakref.WeakKeyDictionary()
+)
+_listeners_lock = threading.Lock()
+
+
+def _get_listener(scheduler: "Any") -> "_CronsListener":
+    with _listeners_lock:
+        listener = _listeners.get(scheduler)
+        if listener is None:
+            listener = _CronsListener()
+            scheduler.add_listener(listener, _CronsListener.MASK)
+            _listeners[scheduler] = listener
+        return listener
+
+
+# APScheduler assigns `uuid4().hex` when a job is added without an `id`.
+_GENERATED_JOB_ID = re.compile(r"[0-9a-f]{32}")
+
+# Generated job ids already warned about.
+_warned_job_ids: "Set[str]" = set()
+
+
+def _has_generated_id(job: "Any") -> bool:
+    return _GENERATED_JOB_ID.fullmatch(job.id) is not None
+
+
+def _get_monitor_slug(job: "Any") -> str:
+    # Generated ids change on every restart, which would create a new monitor
+    # each time. Fall back to the job name (the function name by default).
+    if _has_generated_id(job):
+        return job.name
+    return job.id
+
+
+def _warn_generated_id(job: "Any") -> None:
+    if job.id in _warned_job_ids:
+        return
+    _warned_job_ids.add(job.id)
+    logger.warning(
+        "APScheduler job %r has no explicit `id`, so its name is used as its "
+        "monitor slug, and jobs with the same name share a monitor. Pass `id` "
+        "to `add_job` to give it its own monitor.",
+        job.name,
+    )
+
+
+def _get_crontab_day_of_week(field: "Any") -> "Optional[str]":
+    # APScheduler counts weekdays from Monday = 0, cron from Sunday = 0. Emit
+    # Monday = 1 ... Sunday = 7, which cron also accepts, so ranges stay ranges.
+    values = []
+    for expr in field.expressions:
+        if type(expr) is AllExpression:
+            if expr.step is None:
+                return "*"
+            first, last, step = 0, 6, expr.step
+        elif isinstance(expr, RangeExpression):
+            first = expr.first
+            last = 6 if expr.last is None else expr.last
+            step = expr.step
+        else:
+            return None
+
+        value = str(first + 1)
+        if last != first:
+            value += f"-{last + 1}"
+        if step:
+            value += f"/{step}"
+        values.append(value)
+
+    return ",".join(values)
+
+
+def _get_crontab_field(field: "Any") -> "Optional[str]":
+    for expr in field.expressions:
+        # Rules out "last", "1st mon" and the like.
+        if not (type(expr) is AllExpression or isinstance(expr, RangeExpression)):
+            return None
+    return str(field)
+
+
+def _get_crontab(trigger: "CronTrigger") -> "Optional[str]":
+    fields = {field.name: field for field in trigger.fields}
+
+    # Sentry only takes 5-field crontabs.
+    if str(fields["second"]) != "0":
+        return None
+    if str(fields["year"]) != "*" or str(fields["week"]) != "*":
+        return None
+
+    day = _get_crontab_field(fields["day"])
+    day_of_week = _get_crontab_day_of_week(fields["day_of_week"])
+    if day is None or day_of_week is None:
+        return None
+
+    # APScheduler requires both to match, cron requires either.
+    if day != "*" and day_of_week != "*":
+        return None
+
+    minute = _get_crontab_field(fields["minute"])
+    hour = _get_crontab_field(fields["hour"])
+    month = _get_crontab_field(fields["month"])
+    if minute is None or hour is None or month is None:
+        return None
+
+    return f"{minute} {hour} {day} {month} {day_of_week}"
+
+
+def _get_monitor_config(trigger: "Any") -> "Optional[MonitorConfig]":
+    # Sentry schedules have no end, so finite triggers would alert as missed.
+    if getattr(trigger, "end_date", None) is not None:
+        return None
+
+    monitor_config: "MonitorConfig"
+    if isinstance(trigger, CronTrigger):
+        crontab = _get_crontab(trigger)
+        if crontab is None:
+            return None
+        # Without a timezone Sentry would read the crontab as UTC.
+        timezone = _get_timezone_name(trigger.timezone)
+        if timezone is None:
+            return None
+        monitor_config = {
+            "schedule": {"type": "crontab", "value": crontab},
+            "timezone": timezone,
+        }
+    elif isinstance(trigger, IntervalTrigger):
+        schedule = _get_interval_schedule(trigger.interval.total_seconds())
+        if schedule is None:
+            return None
+        monitor_config = {"schedule": schedule}
+    else:
+        # DateTrigger (one-off) and combining triggers have no schedule to monitor.
+        return None
+
+    # Jitter delays runs by up to that many seconds; add it to Sentry's
+    # default 1 minute margin.
+    jitter = getattr(trigger, "jitter", None)
+    if jitter:
+        monitor_config["checkin_margin"] = 1 + math.ceil(jitter / 60)
+
+    return monitor_config
+
+
+def _begin_check_ins(
+    integration: "APSchedulerIntegration",
+    executor: "Any",
+    job: "Any",
+    run_times: "List[Any]",
+) -> "Optional[_CronsListener]":
+    monitor_slug = _get_monitor_slug(job)
+    if match_regex_list(monitor_slug, integration.exclude_jobs):
+        return None
+
+    monitor_config = _get_monitor_config(job.trigger)
+    if monitor_config is None:
+        logger.debug(
+            "Not monitoring APScheduler job %r: its trigger %r can't be "
+            "expressed as a Sentry Crons schedule, or its timezone has no "
+            "IANA name.",
+            job.id,
+            job.trigger,
+        )
+        return None
+
+    if _has_generated_id(job):
+        _warn_generated_id(job)
+
+    listener = _get_listener(executor._scheduler)
+    start = now()
+
+    # Each run time gets its own execution event, so its own check-in.
+    for run_time in run_times:
+        listener.add(
+            job.id, run_time, _PendingCheckIn(monitor_slug, monitor_config, start)
+        )
+
+    return listener
+
+
+def _patch_submit_job() -> None:
+    """
+    Send an `in_progress` check-in, with the monitor config derived from the
+    job's trigger, when the scheduler hands a due job to its executor.
+    `_CronsListener` sends the closing `ok`/`error` check-in.
+
+    `submit_job` is called in the scheduler's process for every executor type
+    and is the last place where the `Job` (and so its trigger) is at hand.
+    The check-ins are opened only once it accepts the job, so runs skipped
+    because of `max_instances` get none.
+    """
+    old_submit_job = BaseExecutor.submit_job
+
+    @wraps(old_submit_job)
+    def sentry_submit_job(
+        self: "Any", job: "Any", run_times: "List[Any]", *args: "Any", **kwargs: "Any"
+    ) -> "Any":
+        integration = sentry_sdk.get_client().get_integration(APSchedulerIntegration)
+        if integration is None or not integration.monitor_jobs:
+            return old_submit_job(self, job, run_times, *args, **kwargs)
+
+        listener = None
+        with capture_internal_exceptions():
+            listener = _begin_check_ins(integration, self, job, run_times)
+
+        try:
+            result = old_submit_job(self, job, run_times, *args, **kwargs)
+        except MaxInstancesReachedError:
+            # The run is skipped, not failed.
+            if listener is not None:
+                with capture_internal_exceptions():
+                    for run_time in run_times:
+                        listener.discard(job.id, run_time)
+            raise
+        except BaseException:
+            # Not submitted, so no execution event will close the check-ins.
+            if listener is not None:
+                with capture_internal_exceptions():
+                    for run_time in run_times:
+                        listener.finish(job.id, run_time, MonitorStatus.ERROR)
+            raise
+
+        if listener is not None:
+            with capture_internal_exceptions():
+                for run_time in run_times:
+                    listener.open(job.id, run_time)
+
+        return result
+
+    BaseExecutor.submit_job = sentry_submit_job
diff --git a/sentry_sdk/integrations/arq.py b/sentry_sdk/integrations/arq.py
index 623dda3258..ed1c78572f 100644
--- a/sentry_sdk/integrations/arq.py
+++ b/sentry_sdk/integrations/arq.py
@@ -1,10 +1,10 @@
 import sys
 import time
-from datetime import timedelta, timezone
 
 import sentry_sdk
 from sentry_sdk.consts import OP, SPANDATA, SPANSTATUS
 from sentry_sdk.crons import monitor
+from sentry_sdk.crons.utils import _get_timezone_name
 from sentry_sdk.integrations import DidNotEnable, Integration, _check_minimum_version
 from sentry_sdk.integrations.logging import ignore_logger
 from sentry_sdk.scope import should_send_default_pii
@@ -393,7 +393,7 @@ def _get_crontab(cron_job: "CronJob") -> "Optional[str]":
     return " ".join(fields)  # type: ignore[arg-type]
 
 
-def _get_timezone_name(worker: "Worker") -> "Optional[str]":
+def _get_worker_timezone_name(worker: "Worker") -> "Optional[str]":
     tz = getattr(worker, "timezone", None)
     if tz is None:
         # Before arq 0.25, cron jobs ran in naive local time.
@@ -401,27 +401,15 @@ def _get_timezone_name(worker: "Worker") -> "Optional[str]":
             return "UTC"
         return None
 
-    # zoneinfo and pytz
-    name = getattr(tz, "key", None) or getattr(tz, "zone", None)
-    if isinstance(name, str):
-        return name
-
     # arq defaults to the system's fixed UTC offset at startup.
-    if isinstance(tz, timezone):
-        offset = tz.utcoffset(None)
-        if offset % timedelta(hours=1):
-            return None
-        hours = offset // timedelta(hours=1)
-        return "Etc/GMT%+d" % -hours if hours else "UTC"
-
-    return None
+    return _get_timezone_name(tz)
 
 
 def _get_monitor_config(
     cron_job: "CronJob", worker: "Worker"
 ) -> "Optional[MonitorConfig]":
     crontab = _get_crontab(cron_job)
-    timezone_name = _get_timezone_name(worker)
+    timezone_name = _get_worker_timezone_name(worker)
     if crontab is None or timezone_name is None:
         return None
     return {
diff --git a/setup.py b/setup.py
index 8a066a2506..c0369adb6f 100644
--- a/setup.py
+++ b/setup.py
@@ -46,6 +46,7 @@ def get_file_text(file_name):
     extras_require={
         "aiohttp": ["aiohttp>=3.5"],
         "anthropic": ["anthropic>=0.16"],
+        "apscheduler": ["apscheduler>=3.3,<4"],
         "arq": ["arq>=0.23"],
         "asyncpg": ["asyncpg>=0.23"],
         "beam": ["apache-beam>=2.12"],
diff --git a/tests/integrations/apscheduler/__init__.py b/tests/integrations/apscheduler/__init__.py
new file mode 100644
index 0000000000..2454f29039
--- /dev/null
+++ b/tests/integrations/apscheduler/__init__.py
@@ -0,0 +1,3 @@
+import pytest
+
+pytest.importorskip("apscheduler")
diff --git a/tests/integrations/apscheduler/test_apscheduler.py b/tests/integrations/apscheduler/test_apscheduler.py
new file mode 100644
index 0000000000..63d25c8414
--- /dev/null
+++ b/tests/integrations/apscheduler/test_apscheduler.py
@@ -0,0 +1,481 @@
+import asyncio
+import threading
+from datetime import datetime, timedelta, timezone
+from unittest import mock
+
+import pytest
+from apscheduler.events import (
+    EVENT_JOB_ERROR,
+    EVENT_JOB_EXECUTED,
+    EVENT_JOB_MAX_INSTANCES,
+    EVENT_JOB_MISSED,
+)
+from apscheduler.executors.pool import ProcessPoolExecutor, ThreadPoolExecutor
+from apscheduler.schedulers.asyncio import AsyncIOScheduler
+from apscheduler.schedulers.background import BackgroundScheduler
+from apscheduler.triggers.cron import CronTrigger
+from apscheduler.triggers.date import DateTrigger
+from apscheduler.triggers.interval import IntervalTrigger
+
+from sentry_sdk.integrations import apscheduler as apscheduler_integration
+from sentry_sdk.integrations.apscheduler import APSchedulerIntegration
+
+
+def _utcnow():
+    # Naive UTC; the schedulers below run in UTC. APScheduler < 3.7 only takes
+    # pytz timezones, so avoid passing tzinfo objects.
+    return datetime.now(timezone.utc).replace(tzinfo=None)
+
+
+def _check_ins(envelopes):
+    return [
+        item.payload.json
+        for envelope in envelopes
+        for item in envelope.items
+        if item.headers.get("type") == "check_in"
+    ]
+
+
+def ok_job():
+    pass
+
+
+def failing_job():
+    raise ValueError("oops")
+
+
+def _run_once(envelopes, trigger, func=ok_job, executor="debug", **job_kwargs):
+    """Run a job once through a real scheduler and return the check-ins."""
+    finished = threading.Event()
+
+    scheduler = BackgroundScheduler(timezone="UTC")
+    scheduler.add_executor(executor, alias="default")
+    # Added before the integration's listener, which is registered on the
+    # first submitted job, but both run in the same thread for each event.
+    scheduler.add_listener(
+        lambda event: finished.set(),
+        EVENT_JOB_EXECUTED | EVENT_JOB_ERROR | EVENT_JOB_MISSED,
+    )
+    job_kwargs.setdefault("id", "my-job")
+    job_kwargs.setdefault("next_run_time", _utcnow())
+    job_kwargs.setdefault("misfire_grace_time", None)
+    scheduler.add_job(func, trigger, **job_kwargs)
+    scheduler.start()
+    try:
+        assert finished.wait(timeout=10)
+    finally:
+        # Waits for the executor, so for the integration's listener, too.
+        scheduler.shutdown(wait=True)
+
+    return _check_ins(envelopes)
+
+
+def test_cron_job_ok(sentry_init, capture_envelopes):
+    sentry_init(integrations=[APSchedulerIntegration(monitor_jobs=True)])
+    envelopes = capture_envelopes()
+
+    check_ins = _run_once(envelopes, CronTrigger(minute="*/5", timezone="UTC"))
+
+    assert len(check_ins) == 2
+    in_progress, ok = check_ins
+
+    assert in_progress["monitor_slug"] == "my-job"
+    assert in_progress["status"] == "in_progress"
+    assert in_progress["monitor_config"] == {
+        "schedule": {"type": "crontab", "value": "*/5 * * * *"},
+        "timezone": "UTC",
+    }
+
+    assert ok["monitor_slug"] == "my-job"
+    assert ok["status"] == "ok"
+    assert ok["check_in_id"] == in_progress["check_in_id"]
+    assert ok["monitor_config"] == in_progress["monitor_config"]
+    assert ok["duration"] >= 0
+
+
+def test_cron_job_error(sentry_init, capture_envelopes):
+    sentry_init(integrations=[APSchedulerIntegration(monitor_jobs=True)])
+    envelopes = capture_envelopes()
+
+    check_ins = _run_once(
+        envelopes, CronTrigger(minute="*/5", timezone="UTC"), failing_job
+    )
+
+    assert [c["status"] for c in check_ins] == ["in_progress", "error"]
+    assert check_ins[0]["check_in_id"] == check_ins[1]["check_in_id"]
+
+
+def test_missed_run_is_error(sentry_init, capture_envelopes):
+    sentry_init(integrations=[APSchedulerIntegration(monitor_jobs=True)])
+    envelopes = capture_envelopes()
+
+    check_ins = _run_once(
+        envelopes,
+        CronTrigger(minute="*/5", timezone="UTC"),
+        next_run_time=_utcnow() - timedelta(minutes=1),
+        misfire_grace_time=1,
+    )
+
+    assert [c["status"] for c in check_ins] == ["in_progress", "error"]
+
+
+def test_monitoring_is_opt_in(sentry_init, capture_envelopes):
+    sentry_init(integrations=[APSchedulerIntegration()])
+    envelopes = capture_envelopes()
+
+    check_ins = _run_once(envelopes, CronTrigger(minute="*/5", timezone="UTC"))
+
+    assert check_ins == []
+
+
+def test_exclude_jobs(sentry_init, capture_envelopes):
+    sentry_init(
+        integrations=[APSchedulerIntegration(monitor_jobs=True, exclude_jobs=["my-.*"])]
+    )
+    envelopes = capture_envelopes()
+
+    check_ins = _run_once(envelopes, CronTrigger(minute="*/5", timezone="UTC"))
+
+    assert check_ins == []
+
+
+def test_generated_job_id_uses_job_name(sentry_init, capture_envelopes):
+    sentry_init(integrations=[APSchedulerIntegration(monitor_jobs=True)])
+    envelopes = capture_envelopes()
+
+    with mock.patch.object(apscheduler_integration.logger, "warning") as warning:
+        check_ins = _run_once(
+            envelopes, CronTrigger(minute="*/5", timezone="UTC"), id=None
+        )
+
+    assert [c["monitor_slug"] for c in check_ins] == ["ok_job", "ok_job"]
+    warning.assert_called_once()
+    assert "has no explicit `id`" in warning.call_args[0][0]
+
+
+def test_generated_job_id_warns_once(monkeypatch):
+    monkeypatch.setattr(apscheduler_integration, "_warned_job_ids", set())
+
+    class FakeJob:
+        id = "0123456789abcdef0123456789abcdef"
+        name = "ok_job"
+
+    with mock.patch.object(apscheduler_integration.logger, "warning") as warning:
+        apscheduler_integration._warn_generated_id(FakeJob())
+        apscheduler_integration._warn_generated_id(FakeJob())
+
+    warning.assert_called_once()
+
+
+@pytest.mark.parametrize(
+    "cron_kwargs, expected",
+    [
+        ({"minute": "*/5"}, "*/5 * * * *"),
+        ({"hour": 3}, "0 3 * * *"),
+        ({"hour": "9-17", "minute": "30"}, "30 9-17 * * *"),
+        ({"day": 1, "hour": 0}, "0 0 1 * *"),
+        ({"month": "1-3", "day": 15}, "0 0 15 1-3 *"),
+        ({"day_of_week": "mon-fri", "hour": 9}, "0 9 * * 1-5"),
+        ({"day_of_week": "sat,sun", "hour": 9}, "0 9 * * 6,7"),
+        ({"day_of_week": "0", "hour": 9}, "0 9 * * 1"),
+        ({"day_of_week": "*/2", "hour": 9}, "0 9 * * 1-7/2"),
+    ],
+)
+def test_cron_trigger_monitor_config(
+    sentry_init, capture_envelopes, cron_kwargs, expected
+):
+    sentry_init(integrations=[APSchedulerIntegration(monitor_jobs=True)])
+    envelopes = capture_envelopes()
+
+    check_ins = _run_once(envelopes, CronTrigger(timezone="UTC", **cron_kwargs))
+
+    assert check_ins[0]["monitor_config"]["schedule"] == {
+        "type": "crontab",
+        "value": expected,
+    }
+
+
+@pytest.mark.parametrize(
+    "cron_kwargs",
+    [
+        # Seconds and years have no 5-field crontab equivalent.
+        {"second": "*/30"},
+        {"year": 2030},
+        {"week": 2},
+        # APScheduler ANDs day and day_of_week, cron ORs them.
+        {"day": 1, "day_of_week": "mon"},
+        {"day": "last"},
+        {"day": "1st mon"},
+    ],
+)
+def test_cron_trigger_without_crontab_equivalent(
+    sentry_init, capture_envelopes, cron_kwargs
+):
+    sentry_init(integrations=[APSchedulerIntegration(monitor_jobs=True)])
+    envelopes = capture_envelopes()
+
+    check_ins = _run_once(envelopes, CronTrigger(timezone="UTC", **cron_kwargs))
+
+    assert check_ins == []
+
+
+def test_cron_trigger_timezone(sentry_init, capture_envelopes):
+    sentry_init(integrations=[APSchedulerIntegration(monitor_jobs=True)])
+    envelopes = capture_envelopes()
+
+    check_ins = _run_once(envelopes, CronTrigger(hour=9, timezone="Europe/Vienna"))
+
+    assert check_ins[0]["monitor_config"]["timezone"] == "Europe/Vienna"
+
+
+@pytest.mark.parametrize(
+    "offset, expected",
+    [
+        (timedelta(hours=2), "Etc/GMT-2"),
+        (timedelta(hours=-7), "Etc/GMT+7"),
+        (timedelta(0), "UTC"),
+    ],
+)
+def test_cron_trigger_fixed_offset_timezone(
+    sentry_init, capture_envelopes, offset, expected
+):
+    try:
+        trigger = CronTrigger(hour=9, timezone=timezone(offset))
+    except TypeError:
+        pytest.skip("APScheduler < 3.7 only takes pytz timezones.")
+
+    sentry_init(integrations=[APSchedulerIntegration(monitor_jobs=True)])
+    envelopes = capture_envelopes()
+
+    check_ins = _run_once(envelopes, trigger)
+
+    assert check_ins[0]["monitor_config"]["timezone"] == expected
+
+
+def _non_whole_hour_cron_trigger():
+    try:
+        return CronTrigger(hour=9, timezone=timezone(timedelta(hours=5, minutes=30)))
+    except TypeError:
+        # APScheduler < 3.7 only takes pytz timezones.
+        import pytz
+
+        return CronTrigger(hour=9, timezone=pytz.FixedOffset(330))
+
+
+def test_cron_trigger_without_iana_timezone(sentry_init, capture_envelopes):
+    sentry_init(integrations=[APSchedulerIntegration(monitor_jobs=True)])
+    envelopes = capture_envelopes()
+
+    # Sentry rejects timezones like "UTC+05:30", and without one it would
+    # read the crontab as UTC.
+    check_ins = _run_once(envelopes, _non_whole_hour_cron_trigger())
+
+    assert check_ins == []
+
+
+@pytest.mark.parametrize(
+    "interval_kwargs, expected",
+    [
+        ({"minutes": 1}, (1, "minute")),
+        ({"minutes": 90}, (90, "minute")),
+        ({"hours": 2}, (2, "hour")),
+        ({"days": 1}, (1, "day")),
+        ({"weeks": 1}, (7, "day")),
+    ],
+)
+def test_interval_trigger_monitor_config(
+    sentry_init, capture_envelopes, interval_kwargs, expected
+):
+    sentry_init(integrations=[APSchedulerIntegration(monitor_jobs=True)])
+    envelopes = capture_envelopes()
+
+    check_ins = _run_once(envelopes, IntervalTrigger(timezone="UTC", **interval_kwargs))
+
+    value, unit = expected
+    assert check_ins[0]["monitor_config"] == {
+        "schedule": {"type": "interval", "value": value, "unit": unit},
+    }
+    assert [c["status"] for c in check_ins] == ["in_progress", "ok"]
+
+
+@pytest.mark.parametrize("interval_kwargs", [{"seconds": 30}, {"seconds": 90}])
+def test_interval_trigger_not_whole_minutes(
+    sentry_init, capture_envelopes, interval_kwargs
+):
+    sentry_init(integrations=[APSchedulerIntegration(monitor_jobs=True)])
+    envelopes = capture_envelopes()
+
+    check_ins = _run_once(envelopes, IntervalTrigger(timezone="UTC", **interval_kwargs))
+
+    assert check_ins == []
+
+
+@pytest.mark.parametrize(
+    "trigger_cls,trigger_kwargs",
+    [(CronTrigger, {"minute": "*/5"}), (IntervalTrigger, {"minutes": 5})],
+)
+@pytest.mark.parametrize("jitter, checkin_margin", [(1, 2), (60, 2), (61, 3), (300, 6)])
+def test_trigger_jitter_adds_checkin_margin(
+    sentry_init, capture_envelopes, trigger_cls, trigger_kwargs, jitter, checkin_margin
+):
+    try:
+        trigger = trigger_cls(timezone="UTC", jitter=jitter, **trigger_kwargs)
+    except TypeError:
+        pytest.skip("APScheduler < 3.5 has no jitter.")
+
+    sentry_init(integrations=[APSchedulerIntegration(monitor_jobs=True)])
+    envelopes = capture_envelopes()
+
+    check_ins = _run_once(envelopes, trigger)
+
+    assert check_ins[0]["monitor_config"]["checkin_margin"] == checkin_margin
+
+
+@pytest.mark.parametrize(
+    "trigger_cls,trigger_kwargs",
+    [(CronTrigger, {"minute": "*/5"}), (IntervalTrigger, {"minutes": 5})],
+)
+def test_trigger_without_jitter_has_no_checkin_margin(
+    sentry_init, capture_envelopes, trigger_cls, trigger_kwargs
+):
+    sentry_init(integrations=[APSchedulerIntegration(monitor_jobs=True)])
+    envelopes = capture_envelopes()
+
+    check_ins = _run_once(envelopes, trigger_cls(timezone="UTC", **trigger_kwargs))
+
+    assert "checkin_margin" not in check_ins[0]["monitor_config"]
+
+
+def test_date_trigger_is_not_monitored(sentry_init, capture_envelopes):
+    sentry_init(integrations=[APSchedulerIntegration(monitor_jobs=True)])
+    envelopes = capture_envelopes()
+
+    check_ins = _run_once(envelopes, DateTrigger(run_date=_utcnow(), timezone="UTC"))
+
+    assert check_ins == []
+
+
+@pytest.mark.parametrize(
+    "trigger_cls,trigger_kwargs",
+    [(CronTrigger, {"minute": "*/5"}), (IntervalTrigger, {"minutes": 5})],
+)
+def test_trigger_with_end_date_is_not_monitored(
+    sentry_init, capture_envelopes, trigger_cls, trigger_kwargs
+):
+    sentry_init(integrations=[APSchedulerIntegration(monitor_jobs=True)])
+    envelopes = capture_envelopes()
+
+    trigger = trigger_cls(
+        timezone="UTC", end_date=_utcnow() + timedelta(days=1), **trigger_kwargs
+    )
+    check_ins = _run_once(envelopes, trigger)
+
+    assert check_ins == []
+
+
+def test_thread_pool_executor(sentry_init, capture_envelopes):
+    sentry_init(integrations=[APSchedulerIntegration(monitor_jobs=True)])
+    envelopes = capture_envelopes()
+
+    check_ins = _run_once(
+        envelopes,
+        CronTrigger(minute="*/5", timezone="UTC"),
+        executor=ThreadPoolExecutor(),
+    )
+
+    assert [c["status"] for c in check_ins] == ["in_progress", "ok"]
+    assert check_ins[0]["check_in_id"] == check_ins[1]["check_in_id"]
+
+
+def test_max_instances_skip_sends_no_check_in(sentry_init, capture_envelopes):
+    sentry_init(integrations=[APSchedulerIntegration(monitor_jobs=True)])
+    envelopes = capture_envelopes()
+
+    started = threading.Event()
+    release = threading.Event()
+    skipped = threading.Event()
+    finished = threading.Event()
+
+    def blocking_job():
+        started.set()
+        assert release.wait(timeout=10)
+
+    scheduler = BackgroundScheduler(timezone="UTC")
+    scheduler.add_executor(ThreadPoolExecutor(), alias="default")
+    scheduler.add_listener(lambda event: skipped.set(), EVENT_JOB_MAX_INSTANCES)
+    scheduler.add_listener(lambda event: finished.set(), EVENT_JOB_EXECUTED)
+    scheduler.add_job(
+        blocking_job,
+        CronTrigger(minute="*/5", timezone="UTC"),
+        id="my-job",
+        next_run_time=_utcnow(),
+        misfire_grace_time=None,
+        max_instances=1,
+    )
+    scheduler.start()
+    try:
+        assert started.wait(timeout=10)
+        # Due again while the first run is still going.
+        scheduler.modify_job("my-job", next_run_time=_utcnow())
+        assert skipped.wait(timeout=10)
+        release.set()
+        assert finished.wait(timeout=10)
+    finally:
+        release.set()
+        scheduler.shutdown(wait=True)
+
+    check_ins = _check_ins(envelopes)
+    assert [c["status"] for c in check_ins] == ["in_progress", "ok"]
+    assert check_ins[0]["check_in_id"] == check_ins[1]["check_in_id"]
+
+
+def test_process_pool_executor(sentry_init, capture_envelopes):
+    sentry_init(integrations=[APSchedulerIntegration(monitor_jobs=True)])
+    envelopes = capture_envelopes()
+
+    check_ins = _run_once(
+        envelopes,
+        CronTrigger(minute="*/5", timezone="UTC"),
+        failing_job,
+        executor=ProcessPoolExecutor(1),
+    )
+
+    assert [c["status"] for c in check_ins] == ["in_progress", "error"]
+    assert check_ins[0]["check_in_id"] == check_ins[1]["check_in_id"]
+
+
+async def async_ok_job():
+    await asyncio.sleep(0)
+
+
+def test_asyncio_scheduler(sentry_init, capture_envelopes):
+    sentry_init(integrations=[APSchedulerIntegration(monitor_jobs=True)])
+    envelopes = capture_envelopes()
+
+    async def main():
+        scheduler = AsyncIOScheduler(timezone="UTC")
+        scheduler.add_job(
+            async_ok_job,
+            CronTrigger(minute="*/5", timezone="UTC"),
+            id="my-async-job",
+            next_run_time=_utcnow(),
+            misfire_grace_time=None,
+        )
+        scheduler.start()
+        try:
+            for _ in range(500):
+                if len(_check_ins(envelopes)) >= 2:
+                    break
+                await asyncio.sleep(0.01)
+        finally:
+            scheduler.shutdown()
+
+    loop = asyncio.new_event_loop()
+    try:
+        loop.run_until_complete(main())
+    finally:
+        loop.close()
+
+    check_ins = _check_ins(envelopes)
+    assert [c["status"] for c in check_ins] == ["in_progress", "ok"]
+    assert [c["monitor_slug"] for c in check_ins] == ["my-async-job"] * 2
diff --git a/tests/test_crons.py b/tests/test_crons.py
index c5e53170e2..357c01f00b 100644
--- a/tests/test_crons.py
+++ b/tests/test_crons.py
@@ -1,11 +1,12 @@
 import uuid
+from datetime import timedelta, timezone, tzinfo
 from unittest import mock
 
 import pytest
 
 import sentry_sdk
 from sentry_sdk.crons import capture_checkin
-from sentry_sdk.crons.utils import _get_interval_schedule
+from sentry_sdk.crons.utils import _get_interval_schedule, _get_timezone_name
 
 
 @sentry_sdk.monitor(monitor_slug="abc123")
@@ -544,3 +545,39 @@ def test_get_interval_schedule(seconds, expected):
 @pytest.mark.parametrize("seconds", [0, 0.5, 30, 59, 90, 61.5, 3601])
 def test_get_interval_schedule_not_whole_minutes(seconds):
     assert _get_interval_schedule(seconds) is None
+
+
+class _NamedZone(tzinfo):
+    def __init__(self, key):
+        self.key = key
+
+
+@pytest.mark.parametrize(
+    "tz, expected",
+    [
+        (timezone.utc, "UTC"),
+        (timezone(timedelta(0)), "UTC"),
+        (timezone(timedelta(hours=2)), "Etc/GMT-2"),
+        (timezone(timedelta(hours=-7)), "Etc/GMT+7"),
+        (timezone(timedelta(hours=5, minutes=30)), None),
+        (_NamedZone("Europe/Vienna"), "Europe/Vienna"),
+        # tzlocal's zone when it can't find the system's.
+        (_NamedZone("local"), None),
+        (_NamedZone(None), None),
+    ],
+)
+def test_get_timezone_name(tz, expected):
+    assert _get_timezone_name(tz) == expected
+
+
+def test_get_timezone_name_zoneinfo():
+    zoneinfo = pytest.importorskip("zoneinfo")
+    assert _get_timezone_name(zoneinfo.ZoneInfo("Europe/Vienna")) == "Europe/Vienna"
+    assert _get_timezone_name(zoneinfo.ZoneInfo("UTC")) == "UTC"
+
+
+def test_get_timezone_name_pytz():
+    pytz = pytest.importorskip("pytz")
+    assert _get_timezone_name(pytz.timezone("Europe/Vienna")) == "Europe/Vienna"
+    assert _get_timezone_name(pytz.utc) == "UTC"
+    assert _get_timezone_name(pytz.FixedOffset(120)) is None
diff --git a/tox.ini b/tox.ini
index 72073b1419..22ae4ea5be 100644
--- a/tox.ini
+++ b/tox.ini
@@ -265,6 +265,12 @@ envlist =
 
 
     # ~~~ Tasks ~~~
+    {py3.6}-apscheduler-v3.3.1
+    {py3.6}-apscheduler-v3.5.3
+    {py3.6,py3.7}-apscheduler-v3.7.0
+    {py3.8,py3.13,py3.14,py3.14t}-apscheduler-v3.11.3
+    {py3.8,py3.13,py3.14,py3.14t}-apscheduler-latest
+
     {py3.7,py3.9,py3.10}-arq-v0.23
     {py3.9,py3.13,py3.14,py3.14t}-arq-v0.28.0
     {py3.9,py3.13,py3.14,py3.14t}-arq-latest
@@ -14882,6 +14888,35 @@ deps =
 
 
     # ~~~ Tasks ~~~
+    apscheduler-v3.3.1: apscheduler==3.3.1
+
+    apscheduler-v3.5.3: apscheduler==3.5.3
+
+    apscheduler-v3.7.0: apscheduler==3.7.0
+
+    apscheduler-v3.11.3: apscheduler==3.11.3
+
+    py3.8-apscheduler-v3.11.3: tzlocal==5.2
+    py3.8-apscheduler-v3.11.3: backports.zoneinfo==0.2.1
+
+    py3.13-apscheduler-v3.11.3: tzlocal==5.4.4
+
+    py3.14-apscheduler-v3.11.3: tzlocal==5.4.4
+
+    py3.14t-apscheduler-v3.11.3: tzlocal==5.4.4
+
+    apscheduler-latest: apscheduler==3.11.3
+
+    py3.8-apscheduler-latest: tzlocal==5.2
+    py3.8-apscheduler-latest: backports.zoneinfo==0.2.1
+
+    py3.13-apscheduler-latest: tzlocal==5.4.4
+
+    py3.14-apscheduler-latest: tzlocal==5.4.4
+
+    py3.14t-apscheduler-latest: tzlocal==5.4.4
+
+
     arq-v0.23: arq==0.23
 
     py3.9-arq-v0.23: pydantic==1.10.26
@@ -19953,6 +19988,7 @@ setenv =
     aiohttp: _TESTPATH=tests/integrations/aiohttp
     aiomysql: _TESTPATH=tests/integrations/aiomysql
     anthropic: _TESTPATH=tests/integrations/anthropic
+    apscheduler: _TESTPATH=tests/integrations/apscheduler
     ariadne: _TESTPATH=tests/integrations/ariadne
     arq: _TESTPATH=tests/integrations/arq
     asyncpg: _TESTPATH=tests/integrations/asyncpg