Google Calendar finally syncs notifications between your multiple Android devices5
Google Calendar for Android has finally been updated to sync notifications between your multiple devices. This way you won't have the same alerts pop up on your tablet that you had cleared on your phone just a few minutes ago. The time-saver comes with the newest version of Google Calendar, so if you haven't enabled automatic updates, you can hit the source link below, or simply go to the Calendar app in the Play Store on your device.
source: GoogleCalendar (Play Store)