You can give others full permission to administer your calendar. 

(**Note: this should be done on a limited basis)

  1. On your computer, open Google Calendar.
  2. On the left, find the "My calendars" section. You might need to click it to expand it.
  3. Point to the calendar you want to share.
  4. Click MoreMore and then Settings and sharing.
  5. Under "Share with specific people," click Add people.
  6. Enter your new delegate’s email address.
  7. Under "Permissions," click Make changes and manage sharing.
  8. Click Send.

Tip: Your delegate  must click the emailed link to add your calendar to their list. If they create an event on your calendar, the invitation will come from you. Learn more about permission settings.

Excerpted from Google Support Article "Share Your Calendar With Someone". Read more here.