diff --git a/calendar/quickstart/quickstart.py b/calendar/quickstart/quickstart.py
index 1f1dc855..18b94995 100644
--- a/calendar/quickstart/quickstart.py
+++ b/calendar/quickstart/quickstart.py
@@ -53,7 +53,7 @@ def main():
     service = build("calendar", "v3", credentials=creds)
 
     # Call the Calendar API
-    now = datetime.datetime.now(tz=datetime.timezone.utc).isoformat() + "Z"  # 'Z' indicates UTC time
+    now = datetime.datetime.now(tz=datetime.timezone.utc).isoformat()
     print("Getting the upcoming 10 events")
     events_result = (
         service.events()