On 17 Apr, 2015, at 13:07 , Paul Eggert <eggert@cs.ucla.edu> wrote:
Thanks for all that work! I'm not sure I knew that Yukon formerly had two time zones. Luckily that predates 1970, and as far as I can tell the legal history you found is all consistent with what's currently in the tz database for America/Dawson.
Note that the Yukon had two time zones until 1973, but the database already knows that. America/Whitehorse is the other side of the split. If you are keeping all that might be better not to lose the reference to the federal statute Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1) available here http://canlii.ca/t/7vhg since that is an interesting bit. While the territorial government explicitly redefined Yukon Standard Time to be (entirely) UTC-8 in 1973 the federal government laws apparently believe that Yukon Standard Time (and the standard time in the Yukon too, from the wording) is still UTC-9 so keeping that reference maybe answers the issue of the database no longer abbreviating Yukon Standard Time (by the Yukon government's definition) to YST. The way the database does it now, representing it as a change to PST, seems to me to be more useful anyway. Dennis Ferguson