diff --git a/.apigentools-info b/.apigentools-info
index 567b048fb1c..c85f9fafbb2 100644
--- a/.apigentools-info
+++ b/.apigentools-info
@@ -4,13 +4,13 @@
     "spec_versions": {
         "v1": {
             "apigentools_version": "1.6.6",
-            "regenerated": "2025-02-24 14:19:07.230112",
-            "spec_repo_commit": "b34a35ef"
+            "regenerated": "2025-02-24 18:17:18.536080",
+            "spec_repo_commit": "5f4a614e"
         },
         "v2": {
             "apigentools_version": "1.6.6",
-            "regenerated": "2025-02-24 14:19:07.246168",
-            "spec_repo_commit": "b34a35ef"
+            "regenerated": "2025-02-24 18:17:18.551562",
+            "spec_repo_commit": "5f4a614e"
         }
     }
 }
\ No newline at end of file
diff --git a/.generator/schemas/v1/openapi.yaml b/.generator/schemas/v1/openapi.yaml
index 595a7442a15..fbb13d77ad4 100644
--- a/.generator/schemas/v1/openapi.yaml
+++ b/.generator/schemas/v1/openapi.yaml
@@ -7437,7 +7437,7 @@ 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:
@@ -7456,6 +7456,11 @@ 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/api/datadogV1/model_monitor_options_scheduling_options_evaluation_window.go b/api/datadogV1/model_monitor_options_scheduling_options_evaluation_window.go
index a14224adb86..c92196a3273 100644
--- a/api/datadogV1/model_monitor_options_scheduling_options_evaluation_window.go
+++ b/api/datadogV1/model_monitor_options_scheduling_options_evaluation_window.go
@@ -10,12 +10,14 @@ import (
 
 // MonitorOptionsSchedulingOptionsEvaluationWindow 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.
 type MonitorOptionsSchedulingOptionsEvaluationWindow struct {
-	// The time of the day at which a one day cumulative evaluation window starts. Must be defined in UTC time in `HH:mm` format.
+	// The time of the day at which a one day cumulative evaluation window starts.
 	DayStarts *string `json:"day_starts,omitempty"`
 	// The minute of the hour at which a one hour cumulative evaluation window starts.
 	HourStarts *int32 `json:"hour_starts,omitempty"`
 	// The day of the month at which a one month cumulative evaluation window starts.
 	MonthStarts *int32 `json:"month_starts,omitempty"`
+	// The timezone of the time of the day of the cumulative evaluation window start.
+	Timezone *string `json:"timezone,omitempty"`
 	// UnparsedObject contains the raw value of the object if there was an error when deserializing into the struct
 	UnparsedObject       map[string]interface{} `json:"-"`
 	AdditionalProperties map[string]interface{} `json:"-"`
@@ -122,6 +124,34 @@ func (o *MonitorOptionsSchedulingOptionsEvaluationWindow) SetMonthStarts(v int32
 	o.MonthStarts = &v
 }
 
+// GetTimezone returns the Timezone field value if set, zero value otherwise.
+func (o *MonitorOptionsSchedulingOptionsEvaluationWindow) GetTimezone() string {
+	if o == nil || o.Timezone == nil {
+		var ret string
+		return ret
+	}
+	return *o.Timezone
+}
+
+// GetTimezoneOk returns a tuple with the Timezone field value if set, nil otherwise
+// and a boolean to check if the value has been set.
+func (o *MonitorOptionsSchedulingOptionsEvaluationWindow) GetTimezoneOk() (*string, bool) {
+	if o == nil || o.Timezone == nil {
+		return nil, false
+	}
+	return o.Timezone, true
+}
+
+// HasTimezone returns a boolean if a field has been set.
+func (o *MonitorOptionsSchedulingOptionsEvaluationWindow) HasTimezone() bool {
+	return o != nil && o.Timezone != nil
+}
+
+// SetTimezone gets a reference to the given string and assigns it to the Timezone field.
+func (o *MonitorOptionsSchedulingOptionsEvaluationWindow) SetTimezone(v string) {
+	o.Timezone = &v
+}
+
 // MarshalJSON serializes the struct using spec logic.
 func (o MonitorOptionsSchedulingOptionsEvaluationWindow) MarshalJSON() ([]byte, error) {
 	toSerialize := map[string]interface{}{}
@@ -137,6 +167,9 @@ func (o MonitorOptionsSchedulingOptionsEvaluationWindow) MarshalJSON() ([]byte,
 	if o.MonthStarts != nil {
 		toSerialize["month_starts"] = o.MonthStarts
 	}
+	if o.Timezone != nil {
+		toSerialize["timezone"] = o.Timezone
+	}
 
 	for key, value := range o.AdditionalProperties {
 		toSerialize[key] = value
@@ -150,19 +183,21 @@ func (o *MonitorOptionsSchedulingOptionsEvaluationWindow) UnmarshalJSON(bytes []
 		DayStarts   *string `json:"day_starts,omitempty"`
 		HourStarts  *int32  `json:"hour_starts,omitempty"`
 		MonthStarts *int32  `json:"month_starts,omitempty"`
+		Timezone    *string `json:"timezone,omitempty"`
 	}{}
 	if err = datadog.Unmarshal(bytes, &all); err != nil {
 		return datadog.Unmarshal(bytes, &o.UnparsedObject)
 	}
 	additionalProperties := make(map[string]interface{})
 	if err = datadog.Unmarshal(bytes, &additionalProperties); err == nil {
-		datadog.DeleteKeys(additionalProperties, &[]string{"day_starts", "hour_starts", "month_starts"})
+		datadog.DeleteKeys(additionalProperties, &[]string{"day_starts", "hour_starts", "month_starts", "timezone"})
 	} else {
 		return err
 	}
 	o.DayStarts = all.DayStarts
 	o.HourStarts = all.HourStarts
 	o.MonthStarts = all.MonthStarts
+	o.Timezone = all.Timezone
 
 	if len(additionalProperties) > 0 {
 		o.AdditionalProperties = additionalProperties
diff --git a/tests/scenarios/features/v1/monitors.feature b/tests/scenarios/features/v1/monitors.feature
index bb344afd780..05ef98216ed 100644
--- a/tests/scenarios/features/v1/monitors.feature
+++ b/tests/scenarios/features/v1/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