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Show contacts’ birthdays in Calendar on Mac
When you add birthdays to contact cards, you can see the birthdays on the Birthdays calendar in the Calendar app – just make sure Calendar preferences are set to show the Birthdays calendar.
Ask Siri. When you add a birthday to someone’s contact card, you can say something like: “When is Chloe’s birthday?” Learn more about Siri.
Open the Calendar app
on your Mac, then choose Calendar > Preferences.
Click General, then select “Show Birthdays calendar”.
The Birthdays calendar is updated automatically when you add or remove birthdays in Contacts.