Log in to your Gmail account and click your username or profile photo in the main menu of your inbox. Select the “Account” link in the drop-down menu that appears, and then click “Edit Your Profile” in the main panel. Click the “Edit” link in the Basic Information section. Locate the Birthday section in your Google account’s basic information. This is the birth date that you entered when you first registered for a Gmail account, and the date that displays on your Google profile. Writer Bio