You can set up your phone to stay in sync with the following types of calendars:

• On your phone, sign in to your Google Account so you’ll be able to sync the Calendar app with your Google Calendar online. You can add multiple Google Accounts.
• If you’re using Microsoft Outlook® on your computer, you can set up HTC Sync on your computer to sync Outlook Calendar with the Calendar app.

• If you have a Microsoft Exchange ActiveSync account and you have added it on your phone, you can sync the Calendar app with your Exchange ActiveSync calendar events.

If you’ve signed in to your social network accounts such as Facebook, birthdays and events of friends will appear in Calendar.