Calendar sharing settings
You can share an entire calendar, which is useful when you're part of a group that has shared events, like a softball team. Click the small triangle next to a calendar's name, then choose "Share this calendar."

Sharing with friends
You control with whom your calendar is shared and what information others can see. Calendars can be shared with individuals that you specify.

Share with the world
You can also choose to make your calendars public and searchable by other users.