If your calendar isn't syncing to your phone first make sure 

  • You're connected to the Internet
  • Your using the Google Calendar app and it is up to date
  • Check that the calendar is visible
  • Make sure new event are being added to your Google Calendar


If you're still experiencing issues please go to this link from Google


https://support.google.com/calendar/answer/6261951?hl=en&ref_topic=3417969