"Chris Walton" <Chris.Walton@telus.com> writes:
Zone America/Atikokan -6:06:30 - LMT 1884 -6:00 Canada C%sT 1970 -5:00 - EST
Thanks for the detailed info and proposed patch. I'm inclined to take it, except that a transition on 1970-01-01 from CST to EST seems unlikely. Given all the other information you sent, a more plausible changeover time would be the spring 1973 transition. Shanks & Pottenger say that in 1973 Thunder Bay observed EST without DST (this was for a one-year period), much as Atiokokan does now. Possibly Atikokan switched to plain EST at about the same time as Thunder Bay, and then liked it so much that they never changed thereafter. So if we incorporate the older Shanks & Pottenger data, this would be more plausible: Zone America/Atikokan -6:06:28 - LMT 1895 -6:00 Canada C%sT 1940 Sep 29 -6:00 1:00 CDT 1942 Feb 9 2:00s -6:00 Canada C%sT 1973 Apr 29 2:00 -5:00 - EST