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Better documentation for time in Yukon

* NEWS, northamerica: Document the time changes in Yukon better.
(Thanks to Brian Inglis.)
This commit is contained in:
Paul Eggert
2015-04-17 12:58:00 -07:00
parent 2b17ca5fff
commit a0ec682707
2 changed files with 106 additions and 15 deletions

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NEWS
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@ -9,6 +9,10 @@ Unreleased, experimental changes
Printing Office style. This affects only America/Adak since 1983,
as America/Honolulu was already using the new style.
Changes affecting commentary
Yukon's time zone history is documented better. (Thanks to Brian Inglis.)
Release 2015c - 2015-04-11 08:55:55 -0700

View File

@ -1842,21 +1842,108 @@ Zone America/Creston -7:46:04 - LMT 1884
# Northwest Territories, Nunavut, Yukon
# From Paul Eggert (2006-03-22):
# Dawson switched to PST in 1973. Inuvik switched to MST in 1979.
# Mathew Englander (1996-10-07) gives the following refs:
# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
# c. 7 defines Yukon standard time as UTC-9. This is still valid;
# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).
# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.
# * O.I.C. 1980/02 established DST.
# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00.
# Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go
# with Englander.
# From Chris Walton (2006-06-26):
# Here is a link to the old daylight saving portion of the interpretation
# act which was last updated in 1987:
# http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf
# From Brian Inglis (2015-04-14):
#
# I tried to trace the history of Yukon time and found the following
# regulations, giving the reference title and URL if found, regulation name,
# and relevant quote if available. Each regulation specifically revokes its
# predecessor. The final reference is to the current Interpretation Act
# authorizing and resulting from these regulatory changes.
#
# Only recent regulations were retrievable via Yukon government site search or
# index, and only some via Canadian legal sources. Other sources used include
# articles titled "Standard Time and Time Zones in Canada" from JRASC via ADS
# Abstracts, cited by ADO for 1932 ..., and updated versions from 1958 and
# 1970 quoted below; each article includes current extracts from provincial
# and territorial ST and DST regulations at the end, summaries and details of
# standard times and daylight saving time at many locations across Canada,
# with time zone maps, tables and calculations for Canadian Sunrise, Sunset,
# and LMST; they also cover many countries and global locations, with a chart
# and table showing current Universal Time offsets, and may be useful as
# another source of information for 1970 and earlier.
#
# * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26,
# pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS)
# http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75:
# Yukon Interpretation Ordinance
# Yukon standard time is the local mean time at the one hundred and
# thirty-fifth meridian.
#
# * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.;
# JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System
# (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1:
# Yukon Interpretation Ordinance, 1955, Chap. 16.
#
# (1) Subject to this section, standard time shall be reckoned as nine
# hours behind Greenwich Time and called Yukon Standard Time.
#
# (2) Notwithstanding subsection (1), the Commissioner may make regulations
# varying the manner of reckoning standard time.
#
# * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance
# http://? - no online source found
#
# * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC,
# Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS)
# http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon
# Territory Commissioner's Order 1967-59 Interpretation Ordinance ...
#
# 1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon
# Territory on 27th January, 1966, is hereby revoked.
#
# 2. Yukon (East) Standard Time as defined by section 36 of the
# Interpretation Ordinance from and after mid-night on the 28th day of May,
# 1967 shall be reckoned in the same manner as Pacific Standard Time, that
# is to say, eight hours behind Greenwich Time in the area of the Yukon
# Territory lying east of the 138th degree longitude west.
#
# 3. In the remainder of the Territory, lying west of the 138th degree
# longitude west, Yukon (West) Standard Time shall be reckoned as nine
# hours behind Greenwich Time.
#
# * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214
# http://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html
# C.O. 1973/214 INTERPRETATION ACT ...
#
# 1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby
# revoked.
#
# 2. Yukon Standard Time as defined by section 36 of the Interpretation
# Act from and after midnight on the twenty-eighth day of October, 1973
# shall be reckoned in the same manner as Pacific Standard Time, that is
# to say eight hours behind Greenwich Time.
#
# * O.I.C. 1980/02 INTERPRETATION ACT
# http://? - no online source found
#
# * Yukon Daylight Saving Time, YOIC 1987/56
# http://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html
# O.I.C. 1987/056 INTERPRETATION ACT ...
#
# In every year between
# (a) two o'clock in the morning in the first Sunday in April, and
# (b) two o'clock in the morning in the last Sunday in October,
# Standard Time shall be reckoned as seven hours behind Greenwich Time and
# called Yukon Daylight Saving Time.
# ...
# Dated ... 9th day of March, A.D., 1987.
#
# * Yukon Daylight Saving Time 2006, YOIC 2006/127
# http://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html
# O.I.C. 2006/127 INTERPRETATION ACT ...
#
# 1. In Yukon each year the time for general purposes shall be 7 hours
# behind Greenwich mean time during the period commencing at two o'clock
# in the forenoon on the second Sunday of March and ending at two o'clock
# in the forenoon on the first Sunday of November and shall be called
# Yukon Daylight Saving Time.
#
# 2. Order-in-Council 1987/56 is revoked.
#
# 3. This order comes into force January 1, 2007.
#
# * Interpretation Act, RSY 2002, c 125
# http://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html
# From Rives McDow (1999-09-04):
# Nunavut ... moved ... to incorporate the whole territory into one time zone.