Reno and all of Nevada observe Daylight saving time (DST). On the second Sunday in March, clocks are set ahead one hour at 2:00 a.m. local standard time, which becomes 3:00 a.m. local daylight time. On the first Sunday in November, clocks are set back one hour at 2:00 a.m. local daylight time, which becomes 1:00 a.m. local standard time. Reno is in the Pacific Time Zone of the United States.
Establishment of Daylight Saving Time
Here is the official policy about daylight saving time in the United States, brought to us by the U. S. Naval Observatory, official time keeper in the United States. "Starting in 2007, daylight time begins in the United States on the second Sunday in March and ends on the first Sunday in November. On the second Sunday in March, clocks are set ahead one hour at 2:00 a.m. local standard time, which becomes 3:00 a.m. local daylight time. On the first Sunday in November, clocks are set back one hour at 2:00 a.m. local daylight time, which becomes 1:00 a.m. local standard time. These dates were established by Congress in the Energy Policy Act of 2005, Pub. L. no. 109-58, 119 Stat 594 (2005)."
Daylight saving time marks the beginning of the end for winter, with the celestial beginning of spring coming in March (spring equinox). Daylight saving time ends near the time of the fall equinox in September. Each equinox is the day when the sun is directly over the Equator, moving either higher or lower in the sky (depending on where you are in the world) with the changing seasons.
Source: U.S. Naval Observatory, About.com Geography.


