Now, this is rather time twisting :P. But seriously, just like what @Sml32 said, it's due to timezones.
Logical answer: It's because of the timezones. Normal answer: TIME TRAVERLERS!!!! ITS THE DOCTOR!!!!!!!!!!
Heh, speaking of TARDIS, I was having this Convo with 2 of my friends: Me: Hey, I just thought of something. Friend #1: Hmm? Me: What if the TARDIS, instead of being a blue Police Box, was a Red Portapotty instead? Friend #1: That would be weird. Friend #2: That would be cool. I've always wanted a portapotty that was bigger on the inside...