I restored my iPod-touch 4 data to my new iPod-touch 5, and the calendar was looking good, until I realize it was not syncing.
I tried deleting my Google Account and creating again, twice, with no success (now the calendars and events are not even showing in the app).
Also, I tried both Google account and CalDAV account, but none of them are even downloading my calendars.
I use two-step authentication, and I'm using app generated passwords each time I try to add a new account to sync.
The GMail sync is working properly, only the Calendar have some problem.
Is there anything more I can try? Or should I restore and keep my iOS 6?
(By the way, the Reminders are not syncing with iCloud, and Safari is crashing as soon as it opens, even after a few restarts of the iOS. But the calendar is the big problem right now)
Best Answer
Go to https://www.google.com/calendar/syncselect and make sure that you have all of the calendars enabled.
See https://support.google.com/calendar/answer/151674 for more information --- However! Be sure to ignore the part about Google Apps unless you have a paid Google Apps account. Specifically do not use https://m.google.com/sync/settings/ unless you are using a paid Google Apps account.)
http://productforums.google.com/d/msg/calendar/G4ClHD46kP4/LekDrZoyCo0J is also helpful to understand the changes that happened when Google switched from Exchange ActiveSync to CalDAV. The author of that posts suggests https://www.google.com/calendar/iphoneselect and/or https://www.google.com/calendar/hosted/YOUR.DOMAIN.HERE/iphoneselect (the latter being for Google Apps hosted accounts). In my experience they all seem to lead to the same place, but YMMV.
If you have more than one Google Apps/Gmail account, but sure to log into the right one before you try any of this.
Last but not least, you may need to 'force quit' the calendar app on the iOS device (in iOS7, double-press the 'Home' button, then 'flick' the app off the top of the screen). My suggestion would be to start by deleting the Google account from your iOS device, then go and enable the CalDAV settings, and then re-enable the Google Account. That should give everything enough time to re-sync and notice the changes.