If you set birthdays in Google Contacts, those birthdays will be automatically added to your Google Calendar when you sync Google Calendar with Google Contacts. In this guide, we'll show you how to add birthdays to Google Calendar on a desktop browser, just like you would any other event.
How to Add Birthdays to Google Calendar
Enabling the Birthdays calendar in Google Calendar is quick and easy.
Open Google Calendar.
In the upper left corner, select the hamburger menu. If necessary, select the My Calendars dropdown arrow to expand this section.