Sea-Dweller Question -

I just joined the elite watch world (at least in my opinion) by adding a Sea-Dweller. My previous watches were Movado watches and while they got the job done, the Rolex Sea-Dweller is just a beatiful time piece that I plan to cherish forever

I'm a bit upset at myself for not buying the watch in February when I 1st decided that this was my favorite watch in the under $6,000 price range. When I went to the AD I was shocked to see the price increase but the AD was nice enough to give me the old price so I couldn't complain. I guess it cost me a few hundred dollars waiting 2 months

Anyhow, on to my question....I think my Rolex is screwy, for some reason the date changes at 9PM instead of midnight, what is the deal with that? Is this a Rolex thing or is my watch messed up?

Thanks in advance
Larry