Where does the time go?

Over at Stopdesign (a site I found when I was researching how css and blog templates work--the designer, Douglas Bowman, designed a bunch of templates for blogger.com, including the one I'm using now: Rounders 4) the author is talking about making a trip down to Australia and crossing the International Date Line. It's nothing new really, but something I've always found a little curious and can't wrap my mind around every time I think about it. The fourth comment after the story is kind of eerie (as the poster said) too.