I came across a weird google calendar issue last week. Basically it was showing all the events 1 day off, very weird. I had never heard of it before and after a bit of google searching it looks like this is a really common issue. This occurs randomly throughout all Google Calendars so its recommended you check yours.
The work around for it is to go back into the calendar, click embed then click customize. Set the calendar in agenda mode(since its a month view bug) and youll be good to go.
Its rare i get asked a question about google apps i cant immediately answer so i figured this was worth a blog post for all the other people in the future googling this, heh.