|"Just as sunflowers turn their heads to catch every
sunbeam, so too have we discovered a simple way to get more from our sun."
So begins this "webexhibit" from the U.S. Department of Commerce, National
Institute for Standards and Technology (NIST),
Time and Frequency Division and the
Institute for Dynamic Educational
This helpful site includes information on why we adjust our clocks in
the spring, U.S. laws on daylight saving time (DST), worldwide DST, and
interesting "incidents and anecdotes."
Beginning in 2007, the US switches to DST three weeks earlier than in
For the federal law on time, see
15 U.S.C. § 260 et seq. An interesting article citing to old state laws
on time is by Jenni Parrish, Litigating Time in America at the Turn of
the Twentieth Century, 26 Akron L. Rev. 1 (2002).