diff --git a/mcp/delegation/gcal_delegate.py b/mcp/delegation/gcal_delegate.py
index 666af44..0da7a19 100755
--- a/mcp/delegation/gcal_delegate.py
+++ b/mcp/delegation/gcal_delegate.py
@@ -79,8 +79,8 @@ def fetch_events(start: datetime, end: datetime, max_results: int = 50) -> list[
 
     events_result = service.events().list(
         calendarId='primary',
-        timeMin=start.isoformat() + 'Z',
-        timeMax=end.isoformat() + 'Z',
+        timeMin=start.isoformat(),
+        timeMax=end.isoformat(),
         maxResults=max_results,
         singleEvents=True,
         orderBy='startTime'