Calendar events keep disappearing

Hello,
Today I have added a number of appointments to my iPhone Calendar only to find that they have disappeared later. This has happened multiple times today which is a bit of a pain as it is difficult to know which items are missing. I checked my online .mac account tonight and the items are not there, also checked my MacBook pro Calendar and they are not there either. This has never been an issue before and I don't believe that I am doing anything differently.
Any ideas?
Many thanks

Hi, Things have started to go horribly wrong. I have performed a manual sync from my macbook pro to .mac and for a few minutes this restored the calendar on .mac. I added an entry to .mac and a few mins later the calendar was pushed to my iPhone. On returning to my .mac account, the calendar has now been deleted although the data is still on my iPhone and macbook pro. As it's getting late here in the UK, I am switching it all off in the hope that something positive will happen overnight and my faith in technology can be restored - otherwise, it's back to the paper diary!
If you have any other ideas as to what to do, it would be much appreciated..
Thanks

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Hi, Things have started to go horribly wrong. I have performed a manual sync from my macbook pro to .mac and for a few minutes this restored the calendar on .mac. I added an entry to .mac and a few mins later the calendar was pushed to my iPhone. On returning to my .mac account, the calendar has now been deleted although the data is still on my iPhone and macbook pro. As it's getting late here in the UK, I am switching it all off in the hope that something positive will happen overnight and my faith in technology can be restored - otherwise, it's back to the paper diary!
If you have any other ideas as to what to do, it would be much appreciated..
Thanks

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Calendar events keep disappearing

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