Manually changing the date, time, or time zone on an iPhone may interfere with the automatic updating of the date displayed on the Calendar app icon at midnight. The date shown on the icon may not advance automatically as expected, even when the calendar itself displays the correct date.
To ensure the Calendar icon updates correctly at the stroke of midnight, set the iPhone to use an automatic time zone and enable Location Services.
You can verify these settings as follows:
- Set Date & Time to Automatic: Go to Settings → General → Date & Time and enable Set Automatically.
- Enable Location Services: Go to Settings → Privacy & Security → Location Services and turn it on.
- Enable location-based time zone detection: Under Location Services → System Services, ensure Setting Time Zoneis enabled.
These settings allow the iPhone to determine the correct local time and time zone automatically. If you manually override the date, time, or time zone, the Calendar icon may not behave as expected. If the problem persists after restoring the automatic settings, restart the iPhone and check again after midnight.
Note: These settings are recommended for correct automatic timekeeping, but they do not guarantee that the Calendar icon will refresh at exactly midnight in every iOS version.
Go to the Settings app on your iPhone. · Turn ON Set Time Zone Automatically, then do one of the following: Choose a city: Tap Time Zone City, then search for a ...Read more
Change the date and time on iPhone
