TZ
http://en.wikipedia.org/wiki/Time_in_Antarctica
If you thought the time zones in your country were a big enough hassle, you’ll find the hodgepodge of time zones observed in Antarctica an outright mess.
Although logically Antartic, situated at the Earth’s southern pole, should have a bit of each longitudinally defined time zone in it. Instead, the scarcely population continent is a patchwork quilt of time zones dependent upon which country claims territorial rights there and/or which research stations are active in each section.
howtogeek.com