Hello, Is it a local calendar or a remote one? If remote - who is the provider?

I believe it is the local calendar. Upper left hand corner where you can select Mail, Address, Calendar, Tasks, Chat. That Calendar.

Thanks! Monique

Ok, can you do this to help me understand the problem: 1. Click on Tools > Developer tools and give permission to start the console 2. Then add a new event to your calendar 3. Then Click on "Save and Close" button to save the event 4. Then if it's missing and your calendar is not hidden, go to the console you opened in step one and see the section error to see if there is an error shown.

What triggered the event disappearance?

Hi,

I clicked on tools and developer tools but there was no place to give permissions. I closed that.

But I then opened my calendar and boom, all my events are now there, and some were doubled as I tried to add them again.

Thanks! Monique

If It happens again (hopefully never) I'll be happy to investigate further