Google Update Calendar. And, this guide to google calendar will help you leverage. If you don't find the calendar listed, tap show more.

You can update your calendar settings to: Google does not disclose the actual frequency and it can.
These New Changes In Calendar Can Help Your Teams Better Manage Their Time, And G Suite Admins Can Enable These New Updates Starting Today.
For more detail on changes, check out this post.
Tap General To Change The Start Of The Week, Device Time Zone, Default Event Duration, And Other Settings.
Tap the name of the calendar that isn’t showing up.
Create A New Google Calendar.
Images References :
Tap The Name Of The Calendar That Isn't Showing Up.
On your computer, visit google calendar.
For More Detail On Changes, Check Out This Post.
Updates metadata for a calendar.
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