How does Apple's mobile calendar display festival solar terms?

Apple's mobile calendar shows the festival solar terms as follows:

Mobile phone: iPhone 13

System: iOS 15.4. 1

1. Open the main screen of Apple mobile phone, and slide the screen to the right to bring up the negative screen of the mobile phone.

2. Enter the calendar in the negative screen page and search, and open the calendar application in the results.

3. After opening the calendar application, click the calendar at the bottom of the page.

4. After switching to the calendar settings page, check the China holidays under other columns.

5. After returning to the calendar list, select the date of the dot below the calendar, and click the date to view the holidays.