Features:
– Month view.
– Week, day & agenda view.
– Uses Android calendar sync. Works with Google Calendar, Exchange..etc.
– Material design.
– Dark & Light Theme.
– Offline Calendar
– Free, open source and absolutely no Ads.
– Support sharing calendars via ics and the ability to import/export from sdcard.

Bugs & feedback: https://github.com/Etar-Group/Etar-Calendar/issues
Source Code: https://github.com/Etar-Group/Etar-Calendar