diff --git a/.apigentools-info b/.apigentools-info
index eaeeeb8b9c..de98159aed 100644
--- a/.apigentools-info
+++ b/.apigentools-info
@@ -4,13 +4,13 @@
     "spec_versions": {
         "v1": {
             "apigentools_version": "1.6.6",
-            "regenerated": "2025-02-27 21:31:40.799230",
-            "spec_repo_commit": "0b2e3d20"
+            "regenerated": "2025-02-28 17:49:27.289434",
+            "spec_repo_commit": "59e6a448"
         },
         "v2": {
             "apigentools_version": "1.6.6",
-            "regenerated": "2025-02-27 21:31:40.813872",
-            "spec_repo_commit": "0b2e3d20"
+            "regenerated": "2025-02-28 17:49:27.303661",
+            "spec_repo_commit": "59e6a448"
         }
     }
 }
\ No newline at end of file
diff --git a/.generator/schemas/v1/openapi.yaml b/.generator/schemas/v1/openapi.yaml
index 3958e7ef78..9ead562825 100644
--- a/.generator/schemas/v1/openapi.yaml
+++ b/.generator/schemas/v1/openapi.yaml
@@ -7439,7 +7439,7 @@ components:
       properties:
         day_starts:
           description: The time of the day at which a one day cumulative evaluation
-            window starts. Must be defined in UTC time in `HH:mm` format.
+            window starts.
           example: 04:00
           type: string
         hour_starts:
@@ -7458,6 +7458,11 @@ components:
           maximum: 1
           minimum: 1
           type: integer
+        timezone:
+          description: The timezone of the time of the day of the cumulative evaluation
+            window start.
+          example: Europe/Paris
+          type: string
       type: object
     MonitorOverallStates:
       description: The different states your monitor can be in.
diff --git a/src/datadog_api_client/v1/model/monitor_options_scheduling_options_evaluation_window.py b/src/datadog_api_client/v1/model/monitor_options_scheduling_options_evaluation_window.py
index b05ee67b14..ea09bbe53d 100644
--- a/src/datadog_api_client/v1/model/monitor_options_scheduling_options_evaluation_window.py
+++ b/src/datadog_api_client/v1/model/monitor_options_scheduling_options_evaluation_window.py
@@ -31,12 +31,14 @@ def openapi_types(_):
             "day_starts": (str,),
             "hour_starts": (int,),
             "month_starts": (int,),
+            "timezone": (str,),
         }
 
     attribute_map = {
         "day_starts": "day_starts",
         "hour_starts": "hour_starts",
         "month_starts": "month_starts",
+        "timezone": "timezone",
     }
 
     def __init__(
@@ -44,12 +46,13 @@ def __init__(
         day_starts: Union[str, UnsetType] = unset,
         hour_starts: Union[int, UnsetType] = unset,
         month_starts: Union[int, UnsetType] = unset,
+        timezone: Union[str, UnsetType] = unset,
         **kwargs,
     ):
         """
         Configuration options for the evaluation window. If ``hour_starts`` is set, no other fields may be set. Otherwise, ``day_starts`` and ``month_starts`` must be set together.
 
-        :param day_starts: The time of the day at which a one day cumulative evaluation window starts. Must be defined in UTC time in ``HH:mm`` format.
+        :param day_starts: The time of the day at which a one day cumulative evaluation window starts.
         :type day_starts: str, optional
 
         :param hour_starts: The minute of the hour at which a one hour cumulative evaluation window starts.
@@ -57,6 +60,9 @@ def __init__(
 
         :param month_starts: The day of the month at which a one month cumulative evaluation window starts.
         :type month_starts: int, optional
+
+        :param timezone: The timezone of the time of the day of the cumulative evaluation window start.
+        :type timezone: str, optional
         """
         if day_starts is not unset:
             kwargs["day_starts"] = day_starts
@@ -64,4 +70,6 @@ def __init__(
             kwargs["hour_starts"] = hour_starts
         if month_starts is not unset:
             kwargs["month_starts"] = month_starts
+        if timezone is not unset:
+            kwargs["timezone"] = timezone
         super().__init__(kwargs)
diff --git a/tests/v1/features/monitors.feature b/tests/v1/features/monitors.feature
index bb344afd78..05ef98216e 100644
--- a/tests/v1/features/monitors.feature
+++ b/tests/v1/features/monitors.feature
@@ -164,7 +164,7 @@ Feature: Monitors
   Scenario: Edit a monitor returns "Bad Request" response
     Given new "UpdateMonitor" request
     And request contains "monitor_id" parameter from "REPLACE.ME"
-    And body with value {"options": {"evaluation_delay": null, "include_tags": true, "min_failure_duration": 0, "min_location_failed": 1, "new_group_delay": null, "new_host_delay": 300, "no_data_timeframe": null, "notification_preset_name": "show_all", "notify_audit": false, "notify_by": [], "on_missing_data": "default", "renotify_interval": null, "renotify_occurrences": null, "renotify_statuses": ["alert"], "scheduling_options": {"custom_schedule": {"recurrences": [{"rrule": "FREQ=WEEKLY;BYDAY=MO,TU,WE,TH,FR", "start": "2023-08-31T16:30:00", "timezone": "Europe/Paris"}]}, "evaluation_window": {"day_starts": "04:00", "hour_starts": 0, "month_starts": 1}}, "synthetics_check_id": null, "threshold_windows": {"recovery_window": null, "trigger_window": null}, "thresholds": {"critical_recovery": null, "ok": null, "unknown": null, "warning": null, "warning_recovery": null}, "timeout_h": null, "variables": [{"compute": {"aggregation": "avg", "interval": 60000, "metric": "@duration"}, "data_source": "rum", "group_by": [{"facet": "status", "limit": 10, "sort": {"aggregation": "avg", "order": "desc"}}], "indexes": ["days-3", "days-7"], "name": "query_errors", "search": {"query": "service:query"}}]}, "priority": null, "restricted_roles": [], "tags": [], "type": "query alert"}
+    And body with value {"options": {"evaluation_delay": null, "include_tags": true, "min_failure_duration": 0, "min_location_failed": 1, "new_group_delay": null, "new_host_delay": 300, "no_data_timeframe": null, "notification_preset_name": "show_all", "notify_audit": false, "notify_by": [], "on_missing_data": "default", "renotify_interval": null, "renotify_occurrences": null, "renotify_statuses": ["alert"], "scheduling_options": {"custom_schedule": {"recurrences": [{"rrule": "FREQ=WEEKLY;BYDAY=MO,TU,WE,TH,FR", "start": "2023-08-31T16:30:00", "timezone": "Europe/Paris"}]}, "evaluation_window": {"day_starts": "04:00", "hour_starts": 0, "month_starts": 1, "timezone": "Europe/Paris"}}, "synthetics_check_id": null, "threshold_windows": {"recovery_window": null, "trigger_window": null}, "thresholds": {"critical_recovery": null, "ok": null, "unknown": null, "warning": null, "warning_recovery": null}, "timeout_h": null, "variables": [{"compute": {"aggregation": "avg", "interval": 60000, "metric": "@duration"}, "data_source": "rum", "group_by": [{"facet": "status", "limit": 10, "sort": {"aggregation": "avg", "order": "desc"}}], "indexes": ["days-3", "days-7"], "name": "query_errors", "search": {"query": "service:query"}}]}, "priority": null, "restricted_roles": [], "tags": [], "type": "query alert"}
     When the request is sent
     Then the response status is 400 Bad Request