Apple Calendar has no China Festival option.

Add China Festival Options to Apple Calendar.

Check the regional setting: Make sure that the regional setting of your iPhone or iPad is "Chinese mainland". You can check and change it in Settings-General-Language and Region. Turn on the holiday function: In the calendar application, you need to manually turn on the holiday option. This is usually found in account settings, where holiday switches can be enabled.

Check data synchronization: Make sure the device is connected to the network and the data synchronization function is turned on. You can check this in Settings-Calendar-Sync. Subscribe to holiday calendar: None of the above steps can solve the problem. You need to manually subscribe to the holiday calendar in China. In the calendar application, you can subscribe to the holiday calendar by adding a calendar function.

Update the system version: The lower version of the iOS system will affect the function of the calendar application. Try to update the device to the latest iOS version.

Use third-party applications: Apple's own calendar application still can't meet the demand. Download third-party calendar applications that provide more comprehensive holiday information.