How does the iphone calendar display holidays?

The setting method for displaying holidays in Apple's mobile phone calendar is as follows:

Mobile phone: iPhone 13

System: iOS 15. 1

1. On the phone home page, click to open the calendar.

2. Enter the calendar interface.

3. Click on the calendar below.

4. View China holidays to show that you have subscribed and kept the holiday display.

5. Back to the calendar interface, you can see a small black dot below, and the content directly below shows that other solar terms such as Tomb-Sweeping Day and vernal equinox will also be in normal time.