I just added what days I am working in April to my iCal, and then synced with my iPhone. I noticed that all of the times were out by an hour (+1 hour) on my iPhone. I created a few test appointments to see and they were too. I tried replacing all calendars on my iPhone using the option in iTunes and the problem persisted. I checked both my mac and iPhones international settings, and tried time zone support on the iPhone and iCal off and on and no difference. So then i am thinking "maybe the clocks have gone forward or something and no one told me". So i googled British Summer Time and the clocks go forward on 29th March. So i put a test appointment in on the 28th and the times stay correct when synced. So it's definitely BST that's effecting the iPhone. But i am confused as to what to do. If i put all my appointments one hour behind on my mac, they will appear correct on my iPhone but will be wrong on my mac... I wonder whether it will sort itself after the 29th? I mean, if i leave it the clocks on the mac and iPhone should auto-correct... but will the change be reflected in the calendars? Anyone else suffering from this or know a fix? Cheers!! Edit: Found after time zone support is switched on in iCal that all the calendars i had recently put in were set to UTC. I changed them to London and they sync fine now.