Apple's mobile phone calendar is uninstalled, how to return to normal?

After Apple's mobile phone calendar is uninstalled, you can return to normal by the following steps:

1. Check whether the calendar application is hidden: sometimes, the calendar application may be hidden in the settings. You can go to settings > general > restore > home screen layout, and then reset the home screen layout to restore the display of the calendar application.

2. Download the calendar application again: If the calendar application is completely uninstalled, you can open the App Store, search for "Calendar" and download the calendar application again. Be sure to download the official calendar application provided by Apple.

3. Restore the backup: If you have previously backed up the data of your mobile phone, you can restore all the data including the calendar application by restoring the backup. Connect your phone to your computer, open iTunes or Finder (in MacOS Catalina and later), select the restore backup option, and then select the latest backup file to restore.

There are many reasons that may lead to the uninstallation of calendar applications, such as misoperation and system update. In addition, uninstalling the calendar application may result in the loss of previous calendar events and reminders, so you may need to add or restore these data after returning to normal.

In addition, in order to avoid similar situations, it is recommended that you back up your mobile phone data regularly and pay attention to avoid deleting applications by mistake.