Do the styles switch based on the time of the day, or do you have to select that yourself?

Switches automatically for me at least, nice observation btw, hadn't noticed.

Yeah, I haven't actually checked it out at night yet, so I am not sure myself. If it changes automatically then that is cool, if not, it is kind of useless.

awesome, just checked it at home. simple, yet effective. nice touch!

The style switches automatically - at 7am and 7pm - if you have javascript enabled. You can also switch theme using sun and moon links.

nice design from chihhang:
http://www.istockphoto.com/file_closeup/people/3236075-find-it-on-the-net-girl.php?id=3236075

I think this design is great. I love the imagery. Simple but stylish clean design.