How to set Apple's birthday?

1, first open the address book, as shown in the figure below:

2. Select the person whose birthday needs to be set, as shown below:

3. Click Edit in the upper right corner, as shown in the figure below:

4. Click Add Birthday again, as shown in the figure below:

5. Select a date and click Finish, as shown in the figure below:

6. Switch to the calendar and you will find that the birthday has been displayed.