The Calendar app displays events from each of your Google Accounts that synchronizes with your Android device. You can also:- Create, edit, and delete events.- View all your calendars at the same time, including non-Google calendars.- Quickly email all event guests from a notification with a customizable message.Known issues with HTC devices:- Day and week views may not work on some HTC devices.- Notes and pictures may be removed from all calendar events, but will still be available in HTC’s Notes app.- Local unsynced events may be lost after installing Google Calendar.- Notifications won’t make sounds unless HTC’s Calendar app is disabled.- Touching an email invitation in a mail app opens Calendar in the browser rather than the app.