Why doesn't the calendar on Apple's mobile phone show holidays?

If China holidays are turned off in Apple's mobile phone calendar, the holidays will not be displayed on the calendar, and the display can be turned on again.

1. First, open Calendar in Apple's mobile phone, as shown in the figure below.

2. Then in the page that opens, click "Calendar" in the middle of the bottom, as shown in the figure below.

3. Tick "China Holiday" and click "Done" in the upper right corner, as shown in the following figure.

4. China holidays will be displayed at this time, and there will be a dot below the corresponding holiday date, as shown in the figure below.

At present, the calendar that comes with Apple's mobile phone does not directly display festivals. The main reason may be that if you display it directly on it, you will feel messy.