The Sky This Week, 2012 March 6-13 — Naval Oceanography Portal
One of the reasons we change our clocks is that this time of the year we experience the most rapid changes in the times of sunrise and sunset. As we approach the equinox we gain about three minutes of daylight per day. During the course of the week sunrise will arrive 10 minutes earlier and sunset will occur 8 minutes later. We now experience some two hours more daylight than we did just three months ago. Spring is definitely almost here! …
The present rules were amended by the Energy Policy Act of 2005. We’ll stay on Daylight Time until the first Sunday in November, which falls this year on the 4th.
The Sky This Week, 2012 March 6-13 — Naval Oceanography Portal