Calendars are not syncing automatically

[sam1234321]

calendars are not syncing in the calendar app. this is a serious bug that has been going on for a while. even with sync fully enabled and accounts properly configured. it seems like the calendars stop syncing at one point in time you can check the last aync date and you nedd to turn off sync than on so the calendars will sync

[Bigb1026]

I had the same problem.  Just sign out on each calendar on each device, then log back in.  They should then sinc.  It worked for me.