For the past 2-3 months it no longer shows up in my Outlook calendar. Clear out anything you don't use or don't need For years I have sync'd my personal Google calendar with Outlook using the internet calendar feature. To test this theory, free up some storage on your hard drive. After that, scroll up to the top right of your Android phone, tap More, then Show System, and then Calendar Storage Google Calendar events don't take up a lot of space on your phone's hard drive relative to data from other apps, but if your device is filled near to capacity, Google Calendar might have stopped syncing to keep that space free. Go to the Settings app on your Android phone (not the Google settings).
Choose your Google account from the list on your screen
Launch the Settings app on your Android device and tap Accounts. Turning that option back on should fix the issue. If you don't see Event, tap the Event Calendar icon to switch to the correct calendar A possible reason Google Calendar is not syncing is that the calendar sync is disabled on your device. Next to the Event calendar icon, make sure it says Event. If it isn't being added to the Events calendar, you may not see it in the Google Calendar app or at. Home Why Is my Google Calendar not syncing Fix sync problems with the Google Calendar app - iPhone