Cyber mystery

A couple of people have asked why the dates of my recent posts and the Day of the giveaway contest don't match up. The answer is, I don't know. The first day I posted the card just after midnight, making the date Oct 1, but the date on the blog site remained Sept 30. On the chance that the blog site and my computer were in diff time zones, I stayed up until 2 a.m. last night (yawn!) to test it before posting my Day 2 card. Once again, a discrepancy. Even at 2 a.m. the preceding day's date had not turned over. Tomorrow I will post in the "real" morning (that is, the morning when most people are awake, not the wee hours!) and see what happens. I'm sure there is a reason why the dates are contradictory, but I don't know what it is.