diff --git a/frigate/api/defs/events_body.py b/frigate/api/defs/events_body.py
index bfcb2610b..7aef87433 100644
--- a/frigate/api/defs/events_body.py
+++ b/frigate/api/defs/events_body.py
@@ -1,4 +1,3 @@
-from datetime import datetime
 from typing import Optional, Union
 
 from pydantic import BaseModel, Field
@@ -27,7 +26,7 @@ class EventsCreateBody(BaseModel):
 
 
 class EventsEndBody(BaseModel):
-    end_time: Optional[int] = datetime.now().timestamp()
+    end_time: Optional[int] = None
 
 
 class SubmitPlusBody(BaseModel):
diff --git a/frigate/api/defs/review_query_parameters.py b/frigate/api/defs/review_query_parameters.py
index 795531c17..a3f63d292 100644
--- a/frigate/api/defs/review_query_parameters.py
+++ b/frigate/api/defs/review_query_parameters.py
@@ -1,4 +1,3 @@
-from datetime import datetime, timedelta
 from typing import Optional
 
 from pydantic import BaseModel
@@ -11,8 +10,8 @@ class ReviewQueryParams(BaseModel):
     reviewed: Optional[int] = 0
     limit: Optional[int] = None
     severity: Optional[str] = None
-    before: Optional[float] = datetime.now().timestamp()
-    after: Optional[float] = (datetime.now() - timedelta(hours=24)).timestamp()
+    before: Optional[float] = None
+    after: Optional[float] = None
 
 
 class ReviewSummaryQueryParams(BaseModel):
@@ -24,6 +23,6 @@ class ReviewSummaryQueryParams(BaseModel):
 
 class ReviewActivityMotionQueryParams(BaseModel):
     cameras: Optional[str] = "all"
-    before: Optional[float] = datetime.now().timestamp()
-    after: Optional[float] = (datetime.now() - timedelta(hours=1)).timestamp()
+    before: Optional[float] = None
+    after: Optional[float] = None
     scale: Optional[int] = 30
diff --git a/frigate/api/event.py b/frigate/api/event.py
index 74e93b5dd..556d19909 100644
--- a/frigate/api/event.py
+++ b/frigate/api/event.py
@@ -1,6 +1,7 @@
 """Event apis."""
 
 import base64
+import datetime
 import io
 import logging
 import os
@@ -1073,7 +1074,7 @@ def create_event(
 @router.put("/events/{event_id}/end")
 def end_event(request: Request, event_id: str, body: EventsEndBody):
     try:
-        end_time = body.end_time
+        end_time = body.end_time or datetime.datetime.now().timestamp()
         request.app.external_processor.finish_manual_event(event_id, end_time)
     except Exception:
         return JSONResponse(
diff --git a/frigate/api/review.py b/frigate/api/review.py
index eb71b6125..7c05386ef 100644
--- a/frigate/api/review.py
+++ b/frigate/api/review.py
@@ -34,8 +34,11 @@ def review(params: ReviewQueryParams = Depends()):
     reviewed = params.reviewed
     limit = params.limit
     severity = params.severity
-    before = params.before
-    after = params.after
+    before = params.before or datetime.datetime.now().timestamp()
+    after = (
+        params.after
+        or (datetime.datetime.now() - datetime.timedelta(hours=24)).timestamp()
+    )
 
     clauses = [
         (
@@ -425,8 +428,11 @@ def delete_reviews(body: dict = None):
 def motion_activity(params: ReviewActivityMotionQueryParams = Depends()):
     """Get motion and audio activity."""
     cameras = params.cameras
-    before = params.before
-    after = params.after
+    before = params.before or datetime.datetime.now().timestamp()
+    after = (
+        params.after
+        or (datetime.datetime.now() - datetime.timedelta(hours=1)).timestamp()
+    )
     # get scale in seconds
     scale = params.scale
 
@@ -496,8 +502,11 @@ def motion_activity(params: ReviewActivityMotionQueryParams = Depends()):
 def audio_activity(params: ReviewActivityMotionQueryParams = Depends()):
     """Get motion and audio activity."""
     cameras = params.cameras
-    before = params.before
-    after = params.after
+    before = params.before or datetime.datetime.now().timestamp()
+    after = (
+        params.after
+        or (datetime.datetime.now() - datetime.timedelta(hours=1)).timestamp()
+    )
     # get scale in seconds
     scale = params.scale