pike.git / lib / modules / Calendar.pmod / tzdata / northamerica

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pike.git/lib/modules/Calendar.pmod/tzdata/northamerica:17:   # United States      # From Paul Eggert (1999-03-31):   # Howse writes (pp 121-125) that time zones were invented by   # Professor Charles Ferdinand Dowd (1825-1904),   # Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY).   # His pamphlet "A System of National Time for Railroads" (1870)   # was the result of his proposals at the Convention of Railroad Trunk Lines   # in New York City (1869-10). His 1870 proposal was based on Washington, DC,   # but in 1872-05 he moved the proposed origin to Greenwich. - # His proposal was adopted by the railroads on 1883-11-18 at 12:00, - # and the most of the country soon followed suit. +     -  + # From Paul Eggert (2016-09-21): + # Dowd's proposal left many details unresolved, such as where to draw + # lines between time zones. The key individual who made time zones + # work in the US was William Frederick Allen - railway engineer, + # managing editor of the Travelers' Guide, and secretary of the + # General Time Convention, a railway standardization group. Allen + # spent months in dialogs with scientific and railway leaders, + # developed a workable plan to institute time zones, and presented it + # to the General Time Convention on 1883-04-11, saying that his plan + # meant "local time would be practically abolished" - a plus for + # railway scheduling. By the next convention on 1883-10-11 nearly all + # railroads had agreed and it took effect on 1883-11-18 at 12:00. + # That Sunday was called the "day of two noons", as the eastern parts + # of the new zones observed noon twice. Allen witnessed the + # transition in New York City, writing: + # + # I heard the bells of St. Paul's strike on the old time. Four + # minutes later, obedient to the electrical signal from the Naval + # Observatory ... the time-ball made its rapid descent, the chimes + # of old Trinity rang twelve measured strokes, and local time was + # abandoned, probably forever. + # + # Most of the US soon followed suit. See: + # Bartky IR. The adoption of standard time. Technol Cult 1989 Jan;30(1):25-56. + # http://dx.doi.org/10.2307/3105430 +    # From Paul Eggert (2005-04-16):   # That 1883 transition occurred at 12:00 new time, not at 12:00 old time.   # See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005).      # From Paul Eggert (2006-03-22):   # A good source for time zone historical data in the US is   # Thomas G. Shanks, The American Atlas (5th edition),   # San Diego: ACS Publications, Inc. (1991).   # Make sure you have the errata sheet; the book is somewhat useless without it.   # It is the source for most of the pre-1991 US entries below.
pike.git/lib/modules/Calendar.pmod/tzdata/northamerica:406:    -7:00 Denver M%sT 1967    -7:00 US M%sT      # US Pacific time, represented by Los Angeles   #   # California, northern Idaho (Benewah, Bonner, Boundary, Clearwater,   # Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county   # north of the Salmon River, and the towns of Burgdorf and Warren),   # Nevada (except West Wendover), Oregon (except the northern 3/4 of   # Malheur county), and Washington +  + # From Paul Eggert (2016-08-20): + # In early February 1948, in response to California's electricity shortage, + # PG&E changed power frequency from 60 to 59.5 Hz during daylight hours, + # causing electric clocks to lose six minutes per day. (This did not change + # legal time, and is not part of the data here.) See: + # Ross SA. An energy crisis from the past: Northern California in 1948. + # Working Paper No. 8, Institute of Governmental Studies, UC Berkeley, + # 1973-11. http://escholarship.org/uc/item/8x22k30c   # -  + # In another measure to save electricity, DST was instituted from 1948-03-14 + # at 02:01 to 1949-01-16 at 02:00, with the governor having the option to move + # the fallback transition earlier. See pages 3-4 of: + # http://clerk.assembly.ca.gov/sites/clerk.assembly.ca.gov/files/archive/Statutes/1948/48Vol1_Chapters.pdf + # + # In response: + # + # Governor Warren received a torrent of objecting mail, and it is not too much + # to speculate that the objections to Daylight Saving Time were one important + # factor in the defeat of the Dewey-Warren Presidential ticket in California. + # -- Ross, p 25 + # + # On December 8 the governor exercised the option, setting the date to January 1 + # (LA Times 1948-12-09). The transition time was 02:00 (LA Times 1949-01-01). + # + # Despite the controversy, in 1949 California voters approved Proposition 12, + # which established DST from April's last Sunday at 01:00 until September's + # last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed + # the fall-back date to October's last Sunday. See: + # http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props + # http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props + #   # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER - Rule CA 1948 only - Mar 14 2:00 1:00 D + Rule CA 1948 only - Mar 14 2:01 1:00 D   Rule CA 1949 only - Jan 1 2:00 0 S - Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D + Rule CA 1950 1966 - Apr lastSun 1:00 1:00 D   Rule CA 1950 1961 - Sep lastSun 2:00 0 S   Rule CA 1962 1966 - Oct lastSun 2:00 0 S   # Zone NAME GMTOFF RULES FORMAT [UNTIL]   Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02    -8:00 US P%sT 1946    -8:00 CA P%sT 1967    -8:00 US P%sT      # Alaska   # AK%sT is the modern abbreviation for -9:00 per USNO.
pike.git/lib/modules/Calendar.pmod/tzdata/northamerica:3274:   #   # From Brian Inglis (2007-04-28):   # http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26]   # there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three   # rows before that there is an out of date entry for Oct:   # "Eastern Standard Times Begins 2007   # Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time"   # indicating that the normal ET rules are followed.   #   # From Paul Eggert (2014-08-19): - # The 2014-08-13 Cabinet meeting decided to stay on UTC-4 year-round. See: + # The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round. See:   # http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm   # Model this as a switch from EST/EDT to AST ...   # From Chris Walton (2014-11-04):   # ... the TCI government appears to have delayed the switch to   # "permanent daylight saving time" by one year....   # http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm   #   # Zone NAME GMTOFF RULES FORMAT [UNTIL]   Zone America/Grand_Turk -4:44:32 - LMT 1890    -5:07:11 - KMT 1912 Feb # Kingston Mean Time