5 Oct
2010
5 Oct
'10
7:39 p.m.
On Tue, 5 Oct 2010, John Wilkinson wrote:
I found discrepancy between results of the calculation for "America/Chicago" region and published data.
for years 2010-2007 the results match. However, for the 2006 calendar year, published results from several sources are: Start: April 2 End: October 29 and calculated results are: Start: March 12 End November 5
The calculated dates are correct. The United States changed the rules in 2007 (to start the second Sunday in March and end the first Sunday in November): http://en.wikipedia.org/wiki/Energy_Policy_Act_of_2005#Change_to_daylight_sa...
It would seem like the code should use the old rules for 2006 and earlier, though, rather than the new rules. -- Jeremiah Willcock