Sync older events on Android for Google Calendar
This is not device specific. I just used this tip to fix the issue on an HTC DNA and a RAZR MAXX HD.
- Go to the PLAY store and download the latest official Google Calendar app.
- Once installed, go to your device’s Settings> Apps> All Apps> and search Calendar.
- Select Calendar Storage
- Select to Clear Data
Once your Calendar syncs, it will display the previous events 1 year ago.