Could you please try the latest release?
The latest build (6.2.2143) is available at the try page:
Hi. The same problem with the latest version. But I'll tell you a more interesting issue... your page http://www.daypilot.org/demo/Calendar/ is giving me problems too. I cannot resize or move an event to 1:30. It goes to 1:00. But I canmove and resizeat2:30, 3:30, ... And also, I can create an event at 1:30.
I'm in spain. I suppose that local date/time format will not affect, won't it?
A new release is out now (6.2 SP2). It includes a fix for a weird IE8 issue (see the first Calendar-related bug). What you describe looks like it might be related to this issue. Could you please try the new release (build 6.2.2154)?
The local date/time shouldn't have any effect on this. All the calculations are done using the GMT base of the Date object.