- tz - lists.iana.org

Re: CORRECTION: April 18 in CM of OW3
by guy＠auspex.com March 29, 1993

March 29, 1993

> As a matter of fact, this year, summer time in Israel starts at 3-Apr-93 > till 4-Sep-93. Every year the dates of summer time are decided at that > year and cannot be anticipated. I.e., either Ephraim Silverberg, who contributed the most-recently-seen rules for Israel, as seen in "/usr/share/lib/zoneinfo/asia" in SunOS 4.x and 5.x systems and elsewhere: # From Ephraim Silverberg (April 18, 1989): # Prior to 1989, the rules concerning Daylight Savings Time changed every # year; as information, regarding exact times and dates during this period, # is not readily available at the present time, the rules commence starting # with the year 1989. # From 1989 onwards the rules are as follows: # # 1. Daylight Savings Time commences midnight of the first Saturday night # following the seven-day festival of Pesach (Passover). The transition # is from midnight Israel Standard Time to 1 a.m. Israel Daylight Savings # time. As the Pesach festival is dependent on the Lunar calendar (the # first day is always on the 15th day of the month of Nisan), the rule # changes every year on the Gregorian calendar. # # 2. Standard Time is reinstated on the Saturday night whereupon Jews # following the Ashkenazi (European) rite begin to recite the Selichot # (forgiveness) prayers prior to the Jewish Lunar New Year. The transition # is from midnight Israel Daylight Savings time to 11 p.m. Israel Standard # Time. The law (according to the Ashkenazi custom) concerning the # commencement of the Selichot prayers is described in chapter 128, section # 5 of the "Code of Jewish Law," by Rabbi Shlomo Ganzfried (translated by # Hyman E. Goldin): # # Beginning with the Sunday [**] before Rosh Hashanah [***], # we rise early for the service of Selichot (supplications for # forgiveness). If Rosh Hashanah occurs on Monday or Tuesday, we # begin saying the Selichot from the Sunday of the preceding week. # # This, too, varies from year to year on the Gregorian calendar and, thus, # two explicit timezone rules are required for each Gregorian year. # # [**] actually Saturday night as the Jewish day commences at nightfall. # [***] the Jewish Lunar New Year. was mistaken, or, after he sent that information out, the government went back to changing the rules every year? (Please "Cc:" "tz(a)elsie.nci.nih.gov" on any responses.)

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Re: CORRECTION: April 18 in CM of OW3
by guy＠auspex.com March 29, 1993

March 29, 1993

>A week ago I asked: > >>Calendar Manager on Open window 3 has a bug. April 18 cannot be scheduled. >>Try it on your machine and return to me if you find a way to overcome it. > >Thank you all for your answers in which you said that such a problem >doe's not exist on your machine. Well, the problem found in file: > >/usr/share/lib/zoneinfo/asia > >April 18, 1993 was one line in that file which indicates the day of >summer time in Israel. > >Rule Zion 1993 only - Apr 18 00:00 1:00 D > >This line was fixed to: > >Rule Zion 1993 only - Apr 1 23:00 1:00 D > > >and after running 'zic asia', the problem disappear. > >Thanks > >-- > /\/\/\ E-mail: joel(a)mcil.comm.mot.com [ Motorola Communications Israel ] >/ Joel \ X.400 CJN003 [ Fixed & Data Products Division ] >\ Nahum/ Phone: +972 (3) 565-8479 [ 3 Kremenetski Street ] > \____/ Fax: +972 (3) 565-8356 [ 61 250 Tel-Aviv, ISRAEL ] Are you saying that Summer Time begins on April 1, not April 18, this year? If so, it'd cause problems with more than *just* the Calendar Manager, as the compiled time-zone files are used throughout the system. Are there any other errors in the rules for Israel in the "asia" file? We (the Timezone Cabal) would like to have the data in all the files be as correct as possible, so please send us any corrections you have.... (Timezone Caballeros: Should I post a followup and/or a note to "comp.sys.sun.admin" and possibly also "comp.unix.bsd" and "comp.unix.sys5.r4", requesting that *all* fixes to the timezone files be sent to "tz(a)elsie.nci.nih.gov"?)

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Leap second announcement; updated "leapsecond" file
by ado Feb. 2, 1993

Feb. 2, 1993

A leap second announcement from the USNO is attached; as well as a shar-format version of an updated "leapseconds" file. You'll now find "tzdata93b.tar.Z" on elsie.nci.nih.gov; the only change to it from "tzdata93.tar.Z" is the updated "leapseconds" file. --ado > From ntp-relay(a)ni.umd.edu Tue Feb 2 14:49:18 1993 > Return-Path: <ntp-relay(a)ni.umd.edu> > Received: from ni.umd.edu by elsie.nci.nih.gov (4.1/SMI-4.1) > id AA02852; Tue, 2 Feb 93 14:49:14 EST > Received: by ni.umd.edu id AA06039 > (5.65c/IDA-1.4.4 for ntp-list); Tue, 2 Feb 1993 14:21:15 -0500 > Received: from unbmvs1.csd.unb.ca by ni.umd.edu with SMTP id AA06030 > (5.65c/IDA-1.4.4 for <NTP(a)NI.UMD.EDU>); Tue, 2 Feb 1993 14:20:50 -0500 > Received: from unbmvs1.csd.unb.ca by UNBMVS1.csd.unb.ca (IBM MVS SMTP V2R1) > with BSMTP id 3951; Tue, 02 Feb 93 15:20:05 AST > Received: by UNBMVS1 (Mailer 15.14) id 5634; Tue, 02 Feb 93 15:18:57 AST > Date: Tue, 02 Feb 93 15:18:57 AST > From: LANG(a)unb.ca > To: "NTP List" <NTP(a)NI.UMD.EDU> > Subject: Leap Second Announcement from USNO > Message-Id: <ID3951.D930202.T151859.LANG(a)unb.ca> > Status: R > > > -------------------- Start of forwarded message -------------------- > Received: from UNBMVS1(MAILER) by UNBMVS1(Mailer 15.14) id 3871 > for LANG@UNBMVS1; Tue, 02 Feb 93 15:11:45 AST > Received: by UNBMVS1 (Mailer 15.14) id 2636; Tue, 02 Feb 93 15:09:43 AST > Date: Tue, 02 Feb 93 15:09:43 AST > From: <CANSPACE(a)UNB.CA> > To: <lang@UNBMVS1> > Received: from unb.ca by UNBMVS1.csd.unb.ca (IBM MVS SMTP V2R1) with TCP; > Tue, 02 Feb 93 15:08:16 AST > Received: from by unb.ca (4.1/SMI-4.1-921218.08:05) > id AZ01277; Tue, 2 Feb 93 15:08:27 AST > Received: from NEPTUNE.CSD.UNB.CA by NEPTUNE.CSD.UNB.CA (IBM VM SMTP V2R1) > with BSMTP id 5064; Tue, 02 Feb 93 15:03:20 AST > Received: from UNBVM1.BITNET (NJE origin LISTSERV@UNBVM1) by NEPTUNE.CSD.UNB.CA > (LMail V1.1b/1.7e) with BSMTP id 5057; Tue, 2 Feb 1993 14:58:41 -0400 > Comments: Original-Date: Tue, 2 Feb 1993 14:54:47 AST > X-Reply-To: Richard Langley <lang(a)JUPITER.SUN.CSD.UNB.CA> > X-Sender: Canadian Space Geodesy Forum <CANSPACE(a)UNBVM1.BITNET> > X-From: Richard Langley <lang(a)JUPITER.SUN.CSD.UNB.CA> > Subject: Leap Second Announcement from USNO > X-To: CANSPACE(a)unb.ca > X-To: Multiple recipients of list CANSPACE <CANSPACE(a)UNBVM1.BITNET> > Sender: <CANSPACE(a)UNB.CA> > Message-ID: <ID3871.D930202.T150943.CANSPACE(a)UNB.CA> > > File SER14 -- <930201.1735> > > > > U.S. NAVAL OBSERVATORY > WASHINGTON, DC 20392-5420 > > February 1, 1993 > No. 55 > > TIME SERVICE ANNOUNCEMENT SERIES 14 > > UTC TIME STEP > > 1. The International Earth Rotation Service (IERS) has announced the > Introduction of a time step to occur at the end of June 1993. > > 2. Coordinated Universal Time (UTC) will be retarded by 1.0s so that the > sequence of dates of the UTC markers will be: > > 1993 June 30 23h 59m 59s > 1993 June 30 23h 59m 60s > 1993 July 01 0h 0m 0s > > 3. The difference between UTC and International Atomic Time TAI is: > > from 1992 Jul 1, 0h UTC, to 1993 Jul.1, 0h UTC: TAI-UTC = +27s > from 1993 Jul 1, 0h UTC, until further notice: TAI-UTC = +28s > > 4. The insertion of one leap second will be evident by the change of > sign of the DUT1 correction which will become positive. Extrapolated > values of DUT1 are distributed weekly in the IERS Bulletin A (Time > Service Announcement Series 7). > > 5. All coordinated time scales will be affected by this adjustment. > However, the Loran-C, GPS and OMEGA systems will not be adjusted > physically. Tables of Coincidence (Time Service Announcement Series 9) > will be issued for Loran-C. For GPS, the leap second correction > contained within the UTC data of subframe 4, page 18 of the navigation > message transmitted by the satellite will change. > > Before the leap second > > GPS-UTC = +8s (i.e., GPS is ahead of UTC by eight seconds). > > After the leap second > > GPS-UTC = +9s (i.e., GPS will be ahead of UTC by nine seconds). > > The OMEGA Reference Ephoch (ORE) will change - that is, from 1 July > 1993 (after the leap second) the OMEGA system will operate with the > the beginning of segment one on seconds 42, 52, 02, 12, 22, and 32 of > each minute. > > GERNOT M. R. WINKLER > Director > Time Service Department > > via: > ============================================================================== > Richard B. Langley Internet: LANG(a)UNB.CA or SE(a)UNB.CA > Geodetic Research Laboratory BITnet: LANG@UNB or SE@UNB > Dept. of Surveying Engineering Phone: (506) 453-5142 > University of New Brunswick FAX: (506) 453-4943 > Fredericton, N.B., Canada E3B 5A3 Telex: 014-46202 > ============================================================================== > --------------------- End of forwarded message --------------------- : To unbundle, sh this file echo file 'leapseconds' >&2 cat >'leapseconds' <<'End of leapseconds' # @(#)leapseconds 7.6 # Allowance for leapseconds added to each timezone file. # The International Earth Rotation Service periodically uses leap seconds # to keep UTC to within 0.9 s of TAI (atomic time); see # Terry J Quinn, The BIPM and the accurate measure of time, # Proc IEEE 79, 7 (July 1991), 894-905. # There were no leap seconds before 1972, because the official mechanism # accounting for the discrepancy between atomic time and the earth's rotation # did not exist until the early 1970s. # The correction (+ or -) is made at the given time, so lines # will typically look like: # Leap YEAR MON DAY 23:59:60 + R/S # or # Leap YEAR MON DAY 23:59:59 - R/S # If the leapsecond is Rolling (R) the given time is local time # If the leapsecond is Stationary (S) the given time is GMT # Leap YEAR MONTH DAY HH:MM:SS CORR R/S Leap 1972 Jun 30 23:59:60 + S Leap 1972 Dec 31 23:59:60 + S Leap 1973 Dec 31 23:59:60 + S Leap 1974 Dec 31 23:59:60 + S Leap 1975 Dec 31 23:59:60 + S Leap 1976 Dec 31 23:59:60 + S Leap 1977 Dec 31 23:59:60 + S Leap 1978 Dec 31 23:59:60 + S Leap 1979 Dec 31 23:59:60 + S Leap 1981 Jun 30 23:59:60 + S Leap 1982 Jun 30 23:59:60 + S Leap 1983 Jun 30 23:59:60 + S Leap 1985 Jun 30 23:59:60 + S Leap 1987 Dec 31 23:59:60 + S Leap 1989 Dec 31 23:59:60 + S Leap 1990 Dec 31 23:59:60 + S Leap 1992 Jun 30 23:59:60 + S Leap 1993 Jun 30 23:59:60 + S End of leapseconds exit

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End of Rio hiccup
by ado Feb. 2, 1993

Feb. 2, 1993

Again forwarded from comp.protocols.time.ntp. Since the article does not report just when the mayor turned the watch back, I'll forego making a Hawaii-style change to the southamerica file. --ado > From emv(a)msen.com Tue Feb 2 12:43:49 1993 > Path: nih-csl!darwin.sura.net!paladin.american.edu!howland.reston.ans.net!usc!sdd.hp.com!nigel.msen.com!emv > From: emv(a)msen.com (Edward Vielmetti) > Newsgroups: comp.protocols.time.ntp > Subject: Re: [brazil-time] rio de janeiro asks 'what time is it ?' > Message-ID: <1kmbt3INN36j(a)nigel.msen.com> > Date: 2 Feb 93 17:43:49 GMT > References: <1kkdseINNn87(a)nigel.msen.com> > Distribution: inet > Organization: Msen, Inc. -- Ann Arbor, Michigan > Lines: 29 > NNTP-Posting-Host: garnet.msen.com > X-Newsreader: TIN [version 1.1 PL8] > > Edward Vielmetti (emv(a)msen.com) wrote: > : Clock watchers take note... > > Ah, the time crisis in Brazil has passed (this also from REUTER). > > AM-BRAZIL-TIME 1STLD > RIO MAYOR RELUCTANTLY GIVES UP EXTRA HOUR OF DAYLIGHT > > (Eds: updates) > RIO DE JANEIRO, Brazil, Reuter - The mayor of Rio has > reluctantly agreed to set the city's clocks back one hour, > ending his defiance of a federal regulation to end summer > daylight saving time. > Mayor Cesar Maia turned his own watch back one hour Monday > after meeting Brazilian President Itamar Franco. > ``Now the Rio mayor and the president's watches are set for > the same time,'' Maia said. > He had ordered city workers to continue on the summer > schedule until Feb. 28, saying Rio's tourist industry needed the > extra hour of daylight. > But Rio banks, businesses, airports, bus stations, stock > market and major companies operated by the federal government's > time -- three hours behind Greenwich Mean Time-- causing great > confusion. > REUTER > > Edward Vielmetti, vice president for research, Msen Inc. emv(a)Msen.com > Msen Inc., 628 Brooks, Ann Arbor MI 48103 +1 313 998 4562 (fax: 998 4563)

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Local time hiccup in Brazil
by ado Feb. 2, 1993

Feb. 2, 1993

The attached from comp.protocols.time.ntp. --ado > From emv(a)msen.com Mon Feb 1 19:05:20 1993 > Path: nih-csl!darwin.sura.net!newsserver.jvnc.net!yale.edu!nigel.msen.com!emv > From: emv(a)msen.com (Edward Vielmetti) > Newsgroups: comp.protocols.time.ntp > Subject: [brazil-time] rio de janeiro asks 'what time is it ?' > Message-ID: <1kkdseINNn87(a)nigel.msen.com> > Date: 2 Feb 93 00:05:20 GMT > Distribution: inet > Organization: Msen, Inc. -- Ann Arbor, Michigan > Lines: 50 > NNTP-Posting-Host: garnet.msen.com > X-Newsreader: TIN [version 1.1 PL8] > > Clock watchers take note... > > [ Article crossposted from msen.reuters.international ] > [ Posted on 1 Feb 1993 13:50:34 -0500 ] > > AM-BRAZIL-TIME > RIO DE JANEIRO ASKS 'WHAT TIME IS IT ?' > > RIO DE JANEIRO, Brazil, Reuter - Residents of Rio de Janeiro > woke up Monday wondering what time it is. > The confusing clock situation arose when Rio Mayor Cesar > Maia defied a Brazilian government regulation to end summer's > daylight savings time Sunday and turn the clocks back an hour. > But Maia, saying Rio's tourism industry needs the extra hour > of daylight that daylight savings time provides, said the city > government and everyone and everything associated with it would > stick with the summertime time schedule until Feb. 28. > ``I am not going to turn my clock back, nor will the clocks > controlled by the city be turned back,'' Maia was quoted as > saying in the Jornal do Brasil newspaper Sunday. > Rio's banks, most businesses, airports, bus stations and the > stock market are abiding by the federal government's time. > Maia said Rio de Janeiro's tourism industry would be hurt by > moving the clocks back in the middle of the Southern > Hemisphere's summer. > ``The mayor said the jobs of 30,000 people depend on this > extra hour of sunlight, when residents and tourists stay on the > streets and beaches spending money and having fun,'' the > spokesman said. > Maia's decree, which does not apply to the city's suburbs, > has left most residents wondering whether they should begin > wearing two watches. > A spokeswoman for the business owners association said Rio > stores and shopping centers were using standard time on Monday, > but it was still not clear what they would do on Tuesday. > ``The official schedule in Rio is the national standard > time. The decree does not impose the summer schedule, but rather > suggests that businesses, services and industry operate on > summer's time,'' said the mayor's spokesman, adding that Rio's > public clocks will be reset to national standard time. > Maia was to meet President Itamar Franco later Monday to > discuss the time situation, among other things. > At least for the meeting, the mayor will have to think > standard time. The meeting is scheduled for 3:30 p.m. federal > government time, the spokesman said. > REUTER > > Edward Vielmetti, vice president for research, Msen Inc. emv(a)Msen.com > Msen Inc., 628 Brooks, Ann Arbor MI 48103 +1 313 998 4562 (fax: 998 4563)

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tzcode93.tar.Z and tzdata93.tar.Z
by ado Jan. 8, 1993

Jan. 8, 1993

A new version of the time zone stuff is available for anonymous ftp from elsie.nci.nih.gov (128.231.16.1), in the ~ftp/pub directory: -r--r--r-- 1 ado 91953 Jan 8 07:01 tzcode93.tar.Z -r--r--r-- 1 ado 44313 Jan 8 07:01 tzdata93.tar.Z At kre's suggestion, the package has been split in two--a code piece (which also includes documentation) that's only of use to folks who want to recompile things and a data piece useful to anyone who can run "zic". The new version has a few changes to the data files, a few portability changes, and an off-by-one fix (with thanks to Tom-Karzes(a)deshaw.com for providing a description and a solution). --ado

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elsie.nci.nih.gov:~ftp/pub/tz92c.tar.Z
by ado Nov. 22, 1992

Nov. 22, 1992

The fallout from the latest round of DST transitions is available as elsie.nci.nih.gov:~ftp/pub/tz92c.tar.Z There are changes for Portugal, Saskatchewan, and "Pacific-New"; there's also a change to "zic.c" that makes it portable to more systems. Any ideas for how to handle things are welcome; they are best mailed to tz(a)elsie.nci.nih.gov so that they can get wide consideration. --ado

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Re:East-Saskatchewan -> Saskatchewan [forwarded with permission]
by ado Nov. 6, 1992

Nov. 6, 1992

> Date: 06 Nov 1992 16:13:04 -0600 (CST) > From: jones(a)skdad.usask.ca (W. Jones) > Subject: Re: East-Saskatchewan -> Saskatchewan > To: ado(a)elsie.nci.nih.gov > Cc: eggert(a)twinsun.com, hardie(a)herald.usask.ca, henry(a)zoo.utoronto.ca, > peachey(a)pixar.com, tastad(a)sklib.usask.ca > ... > > Earlier I wrote: > >The most likely answer is that no-DST was adopted province-wide on some date > >(say in the late 1960s), and before that was subject to community variations. > >One thing I might ask is what precision you consider important for describing > >earlier practice. (Whatever the date, there were certainly no Unix systems > >running in affected areas.) > > The approximate answer below is based on information I got from our law > library, the provincial archives, and the provincial Community Services > department. A precise history would require digging through newspaper > archives, and since you didn't say what you wanted, I didn't bother. > > Saskatchewan is split by a time zone meridian (105W) and over the years > the boundary became pretty ragged as communities near it reevaluated > their affiliations in one direction or the other. In 1965 a provincial > referendum favoured legislating common time practices. > > On 15 April 1966 the Time Act (c. T-14, Revised Statutes of Saskatchewan > 1978) was proclaimed, and established that the eastern part of > Saskatchewan would use CST year round, that districts in northwest > Saskatchewan would by default follow CST but could opt to follow Mountain > Time rules (thus 1 hour difference in the winter and zero in the summer), > and that districts in southwest Saskatchewan would by default follow > MT but could opt to follow CST. > > It took a few years for the dust to settle (I know one story of a town > on one time zone having its school in another, such that a mom had to > serve her family lunch in two shifts), but presently it seems that only > a few towns on the border with Alberta (e.g. Lloydminster) follow MT > rules any more; all other districts appear to have used CST year round > since sometime in the 1960s. > > Here's how I would summarize things. Establish a "Saskatchewan" CST time > zone, and note that it officially exists as of 15 April 1966. Any current > exceptions can put themselves in the "Mountain" zone, since those are the > rules they follow. Any past exceptions can be forgotten, since that's > what those who live here have done.

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East-Saskatchewan -> Saskatchewan [forwarded with permission]
by ado Oct. 28, 1992

Oct. 28, 1992

> From: henry(a)zoo.toronto.edu > Date: Wed, 28 Oct 92 11:58:53 EST > Subject: Re: East-Saskatchewan -> Saskatchewan > To: ado(a)elsie.nci.nih.gov, eggert(a)twinsun.com > Cc: jones(a)skorpio.usask.ca (W. Jones), peachey(a)pixar.com > > >... Anyway, I agree with Darwyn that the situation since around the > >Unix epoch is CST year round for the whole province, not just some flakes > >in the eastern corner. > > Actually, I think the province *is* split, but it's not an eastern corner > vs. everybody else. I grew up in Saskatoon, which is roughly central (and > one of the two major cities), and as a kid (1960s) I never knew DST *existed*. > (DST still strikes me as strange and stupid, actually.) Saskatoon, and at > least the immediate vicinity, has been on CST year round for a long time. > > On the other hand, other areas of the province haven't been... I first > became aware of DST when visiting relatives in Fort Qu'Appelle, a small > town south and east of Saskatoon. That was mid-late 1960s. I haven't been > back there for a long time and don't know the current situation. > > Henry Spencer at U of Toronto Zoology > henry(a)zoo.toronto.edu utzoo!henry

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East-Saskatchewan -> Saskatchewan [forwarded with permission]
by ado Oct. 28, 1992

Oct. 28, 1992

> Date: Tue, 27 Oct 92 15:40:24 PST > From: eggert(a)twinsun.com (Paul Eggert) > Message-Id: <9210272340.AA13750(a)farside.twinsun.com> > To: ado(a)elsie.nci.nih.gov > ... > Subject: East-Saskatchewan -> Saskatchewan > ... > W. Jones works in Saskatoon, which (according to my dictionary) is in Central > Saskatchewan. Assuming he's correct about the clocks in his immediate > neighborhood, at least the `East-' in `East-Saskatchewan' must be wrong. > Of your sources, Bur and Peachey (another Saskatchewan resident) agree with > Jones, whereas Devine disagrees. Given the current evidence, I'd tend to go > with Bur, Jones, and Peachey -- after all, two of them live there.

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