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kdt abbreviations the claim that there s no dst in samoa and the claim that there is dst in alaska and the aleutians from arthur david olson 1988 02 13 legal standard time zone names from united states code 1982 edition and supplement iii title 15 chapter 6 section 260 and forward first names up to 1967 04 01 when most provisions of the uniform time act of 1966 took effect as explained in sections 263 and 261 none united states standard eastern time united states standard mountain time united states standard central time united states standard pacific time none united states standard alaska time none next names from 1967 04 01 until 1983 11 30 the date for public law 98 181 atlantic standard time eastern standard time central standard time mountain standard time pacific standard time yukon standard time alaska hawaii standard time bering standard time and after 1983 11 30 atlantic standard time eastern standard time central standard time mountain standard time pacific standard time alaska standard time hawaii aleutian standard time samoa standard time the law doesn t give abbreviations from paul eggert 2016 12 19 here are urls for the 1918 and 1966 legislation http uscode house gov statviewer htm volume 40 page 451 http uscode house gov statviewer htm volume 80 page 108 although the 1918 names were officially united states standard eastern time and similarly for central mountain pacific and alaska in practice standard was placed just before time as codified in 1966 in practice alaska time was abbreviated ast before 1968 summarizing the 1967 name changes 1918 names 1967 names 08 standard pacific time pst pacific standard time pst 09 unofficial yukon yst yukon standard time yst 10 standard alaska time ast alaska hawaii standard time ahst 11 unofficial nome nst bering standard time bst from paul eggert 2023 01 23 from a 2001 01 08 heads up from rives mcdow public law 106 564 2000 12 23 introduced chamorro standard time for time in guam and the northern marianas see the file australasia also see 15 u s c 263 https www law cornell edu uscode text 15 263 from paul eggert 2015 04 17 hst and hdt are standardized abbreviations for hawaii aleutian standard and daylight times see section 9 47 p 234 of the u s government printing office style manual 2008 https www gpo gov fdsys pkg gpo stylemanual 2008 pdf gpo stylemanual 2008 pdf from arthur david olson 2005 08 09 the following was signed into law on 2005 08 08 h r 6 energy policy act of 2005 sec 110 daylight savings a amendment section 3 a of the uniform time act of 1966 15 u s c 260a a is amended 1 by striking first sunday of april and inserting second sunday of march and 2 by striking last sunday of october and inserting first sunday of november b effective date subsection a shall take effect 1 year after the date of enactment of this act or march 1 2007 whichever is later c report to congress not later than 9 months after the effective date stated in subsection b the secretary shall report to congress on the impact of this section on energy consumption in the united states d right to revert congress retains the right to revert the daylight saving time back to the 2005 time schedules once the department study is complete us eastern time represented by new york connecticut delaware district of columbia most of florida georgia southeast indiana dearborn and ohio counties eastern kentucky except america kentucky louisville below maine maryland massachusetts new hampshire new jersey new york north carolina ohio pennsylvania rhode island south carolina eastern tennessee vermont virginia west virginia from dave cantor 2004 11 02 early this summer i had the occasion to visit the mount washington observatory weather station atop of course mount washington nh one of the staff members said that the station was on eastern standard time and didn t change their clocks for daylight saving so that their reports will always have times which are 5 hours behind utc from paul eggert 2005 08 26 according to today s huntsville times http www al com news huntsvilletimes index ssf base news 1125047783228320 xml coll 1 a few towns on alabama s eastern border with georgia such as phenix city in russell county lanett in chambers county and some towns in lee county set their watches and clocks on eastern time it quotes h h bubba roberts city administrator in phenix city as saying we are in the central time zone but we do go by the eastern time zone because so many people work in columbus from paul eggert 2017 02 22 four cities are involved the two not mentioned above are smiths station and valley barbara brooks valley s assistant treasurer heard it started because west point pepperell textile mills were in alabama while the corporate office was in georgia and residents voted to keep eastern time even after the mills closed see kazek k did you know which alabama towns are in a different time zone al com 2017 02 06 http www al com living index ssf 2017 02 do_you_know_which_alabama_town html from paul eggert 2014 09 06 monthly notices of the royal astronomical society 44 4 1884 02 08 208 says that new york city hall time was 3 minutes 58 4 seconds fast of eastern time i e 4 56 01 6 just before the 1883 switch rule name from to in on at save letter rule nyc 1920 only mar lastsun 2 00 1 00 d rule nyc 1920 only oct lastsun 2 00 0 s rule nyc 1921 1966 apr lastsun 2 00 1 00 d rule nyc 1921 1954 sep lastsun 2 00 0 s rule nyc 1955 1966 oct lastsun 2 00 0 s zone name stdoff rules format until stdoff 4 56 01 6 zone america new_york 4 56 02 lmt 1883 nov 18 17 00u 5 00 us e st 1920 5 00 nyc e st 1942 5 00 us e st 1946 5 00 nyc e st 1967 5 00 us e st us central time represented by chicago alabama arkansas florida panhandle bay calhoun escambia gulf holmes jackson okaloosa santa rosa walton and washington counties illinois western indiana gibson jasper lake laporte newton porter posey spencer vanderburgh and warrick counties iowa most of kansas western kentucky louisiana minnesota mississippi missouri eastern nebraska eastern north dakota oklahoma eastern south dakota western tennessee most of texas wisconsin from paul eggert 2018 01 07 in 1869 the chicago astronomical society contracted with the city to keep time though delayed by the great fire by 1880 a wire ran from the dearborn observatory on the university of chicago campus to city hall which then sent signals to police and fire stations however railroads got their time signals from the allegheny observatory the madison observatory the ann arbor observatory etc so their clocks did not agree with each other or with the city s official time the confusion took some years to clear up see moser m how chicago gave america its time zones chicago 2018 01 04 http www chicagomag com city life january 2018 how chicago gave america its time zones from larry m smith 2006 04 26 re wisconsin https docs legis wisconsin gov statutes statutes 175 pdf is currently enforced at the 01 00 time of change because the local bar time in the state corresponds to 02 00 a number of citations are issued for the sale of class b alcohol after prohibited hours within the deviated hour of this change every year from douglas r bomberg 2007 03 12 wisconsin has enacted nearly eleventh hour legislation to get wi statue 175 closer in synch with the us congress intent https docs legis wisconsin gov 2007 related acts 3 from an email administrator of the city of fort pierre sd 2015 12 21 fort pierre is technically located in the mountain time zone as is the rest of stanley county most of stanley county and fort pierre uses the central time zone due to doing most of their business in pierre so it simplifies schedules i have lived in stanley county all my life and it has been that way since i can remember 43 years from paul eggert 2015 12 25 assume this practice predates 1970 so fort pierre can use america chicago from paul eggert 2015 04 06 in 1950s nashville a public clock had dueling faces one for conservatives and the other for liberals the two sides didn t agree about the time of day i haven t found a photo of this clock nor have i tracked down the time magazine report cited below but here s the story as told by the late american journalist john seigenthaler who was there the two newspaper owners held strongly contrasting political and ideological views evans was a new south liberal stahlman an old south conservative and their two papers frequently clashed editorially often on the same day in the 1950s as the state legislature was grappling with the question of whether to approve daylight saving time for the entire state time magazine reported the nashville banner and the nashville tennessean rarely agree on anything but the time of day and last week they couldn t agree on that it was all too true the clock on the front of the building had two faces the tennessean side of the building facing west the other east when it was high noon banner time it was 11 a m tennessean time seigenthaler j for 100 years tennessean had it covered the tennessean 2007 05 11 republished 2015 04 06 https www tennessean com story insider extras 2015 04 06 archives seigenthaler for 100 years the tennessean had it covered 25348545 rule name from to in on at save letter rule chicago 1920 only jun 13 2 00 1 00 d rule chicago 1920 1921 oct lastsun 2 00 0 s rule chicago 1921 only mar lastsun 2 00 1 00 d rule chicago 1922 1966 apr lastsun 2 00 1 00 d rule chicago 1922 1954 sep lastsun 2 00 0 s rule chicago 1955 1966 oct lastsun 2 00 0 s zone name stdoff rules format until zone america chicago 5 50 36 lmt 1883 nov 18 18 00u 6 00 us c st 1920 6 00 chicago c st 1936 mar 1 2 00 5 00 est 1936 nov 15 2 00 6 00 chicago c st 1942 6 00 us c st 1946 6 00 chicago c st 1967 6 00 us c st oliver county nd switched from mountain to central time on 1992 10 25 zone america north_dakota center 6 45 12 lmt 1883 nov 18 19 00u 7 00 us m st 1992 oct 25 2 00 6 00 us c st morton county nd switched from mountain to central time on 2003 10 26 except for the area around mandan which was already central time see http dmses dot gov docimages p63 135818 pdf officially this switch also included part of sioux county and jones mellette and todd counties in south dakota but in practice these other counties were already observing central time see http www epa gov fedrgstr epa impact 2003 october day 28 i27056 htm zone america north_dakota new_salem 6 45 39 lmt 1883 nov 18 19 00u 7 00 us m st 2003 oct 26 2 00 6 00 us c st from josh findley 2011 01 21 it appears that mercer county north dakota changed from the mountain time zone to the central time zone at the last transition from daylight saving to standard time on nov 7 2010 https www gpo gov fdsys pkg fr 2010 09 29 html 2010 24376 htm http www bismarcktribune com news local article_1eb1b588 c758 11df b472 001cc4c03286 html from andy lipscomb 2011 01 24 according to the census bureau the largest city is beulah although it s commonly referred to as beulah hazen with hazen being the next largest city in mercer county google maps places beulah s city hall at 47 15 51 n 101 46 40 w which yields an offset of 6h47 07 zone america north_dakota beulah 6 47 07 lmt 1883 nov 18 19 00u 7 00 us m st 2010 nov 7 2 00 6 00 us c st us mountain time represented by denver colorado far western kansas montana western nebraska nevada border jackpot owyhee and mountain city new mexico southwestern north dakota western south dakota far western texas el paso county hudspeth county and pine springs and nickel creek in culberson county utah wyoming from paul eggert 2018 10 25 on 1921 03 04 federal law placed all of texas into the central time zone however el paso ignored the law for decades and continued to observe mountain time on the grounds that that s what they had always done and they weren t about to let the federal government tell them what to do eventually the federal government gave in and changed the law on 1970 04 10 to match what el paso was actually doing although that s slightly after our 1970 cutoff there is no need to create a separate zone for el paso since they were ignoring the law anyway see long t el pasoans were time rebels fought to stay in mountain zone el paso times 2018 10 24 06 40 06 https www elpasotimes com story news local el paso 2018 10 24 el pasoans were time rebels fought stay mountain zone 1744509002 rule name from to in on at save letter rule denver 1920 1921 mar lastsun 2 00 1 00 d rule denver 1920 only oct lastsun 2 00 0 s rule denver 1921 only may 22 2 00 0 s rule denver 1965 1966 apr lastsun 2 00 1 00 d rule denver 1965 1966 oct lastsun 2 00 0 s zone name stdoff rules format until zone america denver 6 59 56 lmt 1883 nov 18 19 00u 7 00 us m st 1920 7 00 denver m st 1942 7 00 us m st 1946 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 ¾ 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 https 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 https repository uchastings edu cgi viewcontent cgi article 1501 context ca_ballot_props https repository uchastings edu cgi viewcontent cgi article 1636 context ca_ballot_props rule name from to in on at save letter 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 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 stdoff rules format until zone amer...