Re: [Boost-users] timezone database discrepancy

Subject: Re: [Boost-users] timezone database discrepancy
From: Jeremiah Willcock (jewillco_at_[hidden])
Date: 2010-10-05 15:39:02

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_saving_time

It would seem like the code should use the old rules for 2006 and earlier, 
though, rather than the new rules.

-- Jeremiah Willcock