Today, daylight saving time ended. What is daylight saving time?

According to Wikipeida, Daylight saving time (DST), also known as summer time, is a widely used system of adjusting the official local time forward, usually by one hour from its official standard time, for the spring, summer, and early autumn periods. The term Daylight savings time, although commonly used, is technically incorrect.

DST is most commonly used in temperate regions, due to the considerable variation in the amount of daylight versus darkness across the seasons in those regions.

Since 1966, most of the United States has observed Daylight Saving Time from at 2:00 a.m. on the first Sunday of April to 2:00 a.m. on the last Sunday of October. Beginning in 2007, most of the U.S. will begin Daylight Saving Time at 2:00 a.m. on the second Sunday in March and revert to standard time on the first Sunday in November. In the U.S., each time zone switches at a different time.

On August 8, 2005, President George W. Bush signed the Energy Policy Act of 2005. This Act changed the time change dates for Daylight Saving Time in the U.S. Beginning in 2007, DST will begin on the second Sunday in March and end the first Sunday in November. The Secretary of Energy will report the impact of this change to Congress. Congress retains the right to resume the 2005 Daylight Saving Time schedule once the Department of Energy study is complete. (webexhibits.org/daylightsaving/index.html )

Since Fall back, it means that I have an hour time of sleep time (or study time for my geology)
Kinna troublesome to adjust here and there, but it's cool to in some sense :)

It's summer time again yesterday and today. It's not cold at all. The sun shone brightly and I could feel the heat of the sun on my skin again. I bet the weather will change again tmr. Oklahoma weather!