Google Calendar makes it easy to keep track of important events and happenings. It's easy to add or remove a friend's birthday to your calendar.

Too many birthdays to keep track of? Google can remind you when they're coming up. Here's how to add birthdays to Google Calendar.

Google Calendar allows users to track events, tasks, vacations and more, as well as share information with others.

Google Calendar is currently creating random events for many users based on Gmail messages, newsletters, and more.