On 21/07/15 19:19, Jon Skeet wrote:
Given the existing caveats about "don't trust that values before 1970 are historically accurate" I think it's reasonable to simply assume standard time before then, isn't it? Having said that, WET and EET are somewhat interesting in that their first transitions are in 1977 - so after the "accuracy watershed" so to speak. That does complicate things somewhat.
And some of the others have additional historic data in the 'back' file so that while a truncated TZ file has a common start offset, switching to include all the available data broadens that selection. -- Lester Caine - G8HFL ----------------------------- Contact - http://lsces.co.uk/wiki/?page=contact L.S.Caine Electronic Services - http://lsces.co.uk EnquirySolve - http://enquirysolve.com/ Model Engineers Digital Workshop - http://medw.co.uk Rainbow Digital Media - http://rainbowdigitalmedia.co.uk