Not entirely sure what you refer to, though it could be a timezone issue. The glest servers are located in USA, but the server timezone is UTC, and being called as it is, it would always return server time, not any set time, though that shouldn't be an issue the relative times it uses there. It may be something to do with caching, or the way that the server gets the information from the Glest Board.
In another topic, you should consider updating the images. The simple animated GIFs could be replaced a better quality Javascript controlled PNG "slider". For example, changing the opacity of two overlapping elements with a timer can allow for some very nice image fading, and PNG will give a massive quality boost (GIF fails for images that should be true color, and should never be used for such). Actually, since your images do not contain transparency, you could reduce the filesize further with JPG. You could combine this with image sprites (a "slider" of this kind is best done with setting the images as backgrounds on overlapping divs anyway) for faster loading (of all images in whole, though, not the in-order loading that GIFs have).