I think I have fixed it now for my IPad, but it is very odd. ICloud was not my default calendar. I had been using an IPad 1 (yep, an IPad 1) which had suited me very well and for which the calendar function worked perfectly. The only problem was, I had started using it when living in Europe, and when I came home, I had problems with time zone issues. If I put the IPad on a different time zone, all the entries which I had carefully entered, changed. I could not use an automatic time zone setting as I put in events that would occur in the future in different countries. So, I kept it on a European time zone, and simply had to remember not to use the IPad as a watch. I made the decision, however, when I upgraded to an IPad Air (not mini as I said in my first post), that I would go through the effort of changing the time zone to the one in which I live. I turned off the Bluetooth connection in my IPad 1 and un-synced everything (at least I thought I did), as I wanted to retain the old calendar and old entries in that device, and laboriously updated all the new entries in the new IPad. Given that I no longer have to share my calendar, I was hoping to use the IPad as one used to use an old Palm pilot -- i.e. just enter the info on the device and have it there. No sharing, no need for ICloud, so I made the default to my Yahoo account. But no, I found that did not work. And so I did flick on the ICloud but did forget to make it my default calendar. In any event, even without flicking that final button (which I have done now), all kinds of erroneous entries appeared. I laboriously fixed them again. But then I ran into the problem of not being able to book more than a year ahead. Now I can book ahead, and my bookings do stick and I can view them in my IPad, but only new bookings and some assorted old booking appear when I go onto the ICloud calendar on a computer. Of course it has now messed up my old calendar in my old IPad although I thought I had turned all the sync buttons off. Too much sharing for my liking. All I was looking for was a simple calendar device, and I have spent hours fixing my calendar and don't know what bookings are in fact irretrievably lost. Thank you for your help.