Aside from the excitement, I learned some of the history. Daylight Saving Time was first used during WWI and then again in WWII to save energy. In 1966, it became permanent for all states except Arizona, and the latest four week extension was put in place as a way to reduce the amount of energy used by businesses.
Since this extension just happened in 2007, your computer may not be up to date. Microsoft has a Daylight Saving Time Help and Support page to help you correct it.
Spring is coming! I'm ready!