How does HarmonyOS system make the calendar display the date of the day?

The first step is to turn on the phone, and then click the calendar.

Step 2: After entering the calendar interface, click the icon on the upper right.

After completing step 3, click, and then click Settings.

Step 4: After setting, click [Open] to display holiday information.

Step 5: Click "Open", and the holiday information will be successfully displayed in the calendar of HarmonyOS system, which can be used as needed.