I've got a channel of events. The main exp:channel:calendar tag displays the entry on the appropriate grid day. When I follow to the date's detail template (/calendar/2013/11/22) the entry that was previously in the grid does not show, and instead shows on the next day (/calendar/2013/11/23).
This only happens if the entry's date/time is posted between 11:00pm and 11:59pm. If I change it to 10:59pm it posts on the correct day just fine.
I know it sounds like a DST type issue. It also could be a server offset issue. I'm still looking into it, but would appreciate any feedback.