Calendar entries have disappeared?
Welcome to the Apple community.
I'm not sure if this is what you mean, but:
Settings > Mail, Contacts, Calendars, scroll down to the Calendars section and change the sync option to something other than 'Events 1 month back'.
This solved my problem too!
Thanks, but it was already set at "all events." I tried other time periods as an experiment, but still no calendar entries.
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