What happens if your icalender isnt changing to the most current and is also adding in random event (making duplicates)
Is it synchronised with anything else?
Are your computer date and time correct?
Parts of it is synced with my mobile device and yes my date and time are right. Should i restart my mac?
Until it is corrected I would undo all synchronisation.
It would not do any harm to repair permissions and if practical check or repair the disk.
I prefer to restart all non-server Macs about once a day.
Which OS do you have?
Retrieving data ...