Time messed in last 75 images

Found out I has messed the time stamp in the last 75 or so images I had put on flickr. The catch for the batteries had came loose and when i reset the time from its default of 2007. It was 12 hours behind for not catching the 24hr vs 12 clock thing. Very annoying as I had to go in and fix the damm lot of them. I am still not quite sure with some due to an 1 hour gap i am not quite sure what the hell i was doing.