I've dealt with this quite a bit, and you're right- it's difficult to deal with the conceptual impedance mismatch between the concept of a time, and its discret

I've dealt with this quite a bit, and you're right- it's difficult to deal with the conceptual impedance mismatch between the concept of a time, and its discrete meaning in persistent storage. I wrote a blog post about a month ago that talks about some issues surrounding the concept of "all-day" events which, by definition, are conceptually ambiguous. http://onehub.com/past/2009/9/28/the_joy_of_calendars/ http://onehub.com/past/2009/9/28/the_joy_of_calendars/ Ah, good times.