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zic produces wrong POSIX style TZ
by Andreas Schwab June 23, 2009

June 23, 2009

The current Bangladesh time zone description is unusual in that it ends with being continuously in DST. This uncovered a bug in zic, which infers a POSIX TZ string of BDST-6 from the rule. This is wrong since a time zone that is continuously in DST cannot be expressed by POSIX rules, so zic should not try to generate such a string. Andreas. --- zic.c.~1~ 2009-04-20 22:17:54.000000000 +0200 +++ zic.c 2009-06-22 18:35:10.000000000 +0200 @@ -1921,7 +1921,7 @@ const int zonecount; if (stdrp != NULL && stdrp->r_hiyear == 2037) return; } - if (stdrp == NULL && zp->z_nrules != 0) + if (stdrp == NULL && (zp->z_nrules != 0 || zp->z_stdoff != 0)) return; abbrvar = (stdrp == NULL) ? "" : stdrp->r_abbrvar; doabbr(result, zp->z_format, abbrvar, FALSE, TRUE); -- Andreas Schwab, aschwab(a)redhat.com GPG Key fingerprint = D4E8 DBE3 3813 BB5D FA84 5EC7 45C6 250E 6F00 984E "And now for something completely different."

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tzselect patch: remove dependency on ksh
by Peter Seebach June 22, 2009

June 22, 2009

This was done against the copy in glibc, the eglibc folks suggested I send it on to you as the upstream. Basic synopsis: This allows tzselect to be used on hosts (such as embedded systems) with only a POSIX shell. --- glibc-2.8.orig/timezone/tzselect.ksh 2009-06-22 11:23:11.000000000 -0700 +++ glibc-2.8/timezone/tzselect.sh 2009-06-22 11:52:26.000000000 -0700 @@ -1,27 +1,16 @@ -#! @KSH@ +#! @SH@ -# '@(#)tzselect.ksh 8.1' +# '@(#)tzselect.sh 8.1' # Ask the user about the time zone, and output the resulting TZ value to stdout. # Interact with the user via stderr and stdin. # Contributed by Paul Eggert. -# Porting notes: -# -# This script requires several features of the Korn shell. -# If your host lacks the Korn shell, -# you can use either of the following free programs instead: -# -# <a href=ftp://ftp.gnu.org/pub/gnu/> -# Bourne-Again shell (bash) -# </a> -# -# <a href=ftp://ftp.cs.mun.ca/pub/pdksh/pdksh.tar.gz> -# Public domain ksh -# </a> -# -# This script also uses several features of modern awk programs. +# func_select allows this script to run on shells (such as busybox ash) +# which lack the ksh "select" builtin. + +# This script uses several features of modern awk programs. # If your host lacks awk, or has an old awk that does not conform to Posix.2, # you can use either of the following free programs instead: # @@ -33,6 +22,70 @@ # mawk # </a> +# Implement ksh-style select in POSIX shell + +# We need a mostly-portable echo-n. +case `echo -n "foo\c"` in +*n*c*) func_echo_n() { echo "$*"; } ;; +*n*) func_echo_n() { echo "$*\c"; } ;; +*) func_echo_n() { echo -n "$*"; } ;; +esac + +# Synopsis: Replace "select foo in list" with "while func_select foo in list" +# and this works just like ksh, so far as I know. +func_select () { + func_select_args=0 + if expr "$1" : "^[_a-zA-Z][_a-zA-Z0-9]*$" > /dev/null; then + func_select_var=$1 + else + echo >&2 "func_select: '$1' is not a valid variable name." + return 1 + fi + shift 1 + case $1 in + in) shift 1;; + *) echo >&2 "func_select: usage: func_select var in ... (you must provide +arguments)"; return 1;; + esac + case $# in + 0) echo >&2 "func_select: usage: func_select var in ..."; return 1;; + esac + for func_select_arg + do + func_select_args=`expr $func_select_args + 1` + eval func_select_a_$func_select_args=\$func_select_arg + done + REPLY="" + while : + do + if test -z "$REPLY"; then + func_select_i=1 + while test $func_select_i -le $func_select_args + do + eval echo "\"\$func_select_i) \$func_select_a_$func_select_i\"" + func_select_i=`expr $func_select_i + 1` + done + fi + func_echo_n "${PS3-#? }" >&2 + if read REPLY; then + if test -n "${REPLY}"; then + if expr "$REPLY" : '^[1-9][0-9]*$' > /dev/null; then + if test "$REPLY" -ge 1 && test "$REPLY" -le $func_select_args; then + eval $func_select_var=\$func_select_a_$REPLY + else + eval $func_select_var= + fi + else + eval $func_select_var= + fi + return 0 + fi + else + eval $func_select_var= + return 1 + fi + done +} # Specify default values for environment variables if they are unset. : ${AWK=awk} @@ -62,7 +115,7 @@ # Work around a bug in bash 1.14.7 and earlier, where $PS3 is sent to stdout. -case $(echo 1 | (select x in x; do break; done) 2>/dev/null) in +case $(echo 1 | (while func_select x in x; do break; done) 2>/dev/ null) in ?*) PS3= esac @@ -82,7 +135,7 @@ echo >&2 'Please select a continent or ocean.' - select continent in \ + while func_select continent in \ Africa \ Americas \ Antarctica \ @@ -162,7 +215,7 @@ case $countries in *"$newline"*) echo >&2 'Please select a country.' - select country in $countries + while func_select country in $countries do case $country in '') echo >&2 'Please enter a number in range.';; @@ -201,7 +254,7 @@ *"$newline"*) echo >&2 'Please select one of the following' \ 'time zone regions.' - select region in $regions + while func_select region in $regions do case $region in '') echo >&2 'Please enter a number in range.';; @@ -278,7 +331,7 @@ echo >&2 "Is the above information OK?" ok= - select ok in Yes No + while func_select ok in Yes No do case $ok in '') echo >&2 'Please enter 1 for Yes, or 2 for No.';; -- Peter Seebach <peter.seebach(a)windriver.com> Listen, get this. Nobody with a good compiler needs to be justified.

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NIST Time and Frequency FAQ
by Dave Cantor June 22, 2009

June 22, 2009

In support of the current decision to allow the use of 2400 to indicate midnight at the end of a day, here's a pointer to an article published by NIST. http://tf.nist.gov/general/misc.htm Perhaps, this pointer, or an excerpt of the article, should appear somewhere in the theory file. Dave C.

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Brazil considering a common time zone
by Steffen Thorsen June 21, 2009

June 21, 2009

There is a proposal to have all of Brazil follow Brasilia's time zone. The proposal received a Senate committee approval on Tuesday, June 16, 2009, it is No 486, 2008 is available in PDF (and Portuguese) here: http://legis.senado.gov.br/mate/servlet/PDFMateServlet?s=http://www.senado.… It will probably be debated, and there are no dates yet for when such a possible change will be observed from. We provide some background info about it here: http://www.timeanddate.com/news/time/brazil-one-time-zone.html Best regards, Steffen Thorsen - timeanddate.com

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Please correct time zone information for Bangladesh
by mn4net＠gmail.com June 20, 2009

June 20, 2009

Please refer to the following links http://www.timeanddate.com/worldclock/city.html?n=73 http://www.timeanddate.com/news/time/bangladesh-daylight-saving-2009.html Thanks and regards

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FW: Updated file is not working[BDT to BDST]
by Olson, Arthur David (NIH/NCI) [E] June 18, 2009

June 18, 2009

I'm forwarding this message from Mohammed Zahid Hossain; MZH was not on the time zone mailing list when the message was sent, but is now. --ado -----Original Message----- From: Mohammed Zahid Hossain [mailto:zahid@allbd.com] Sent: Thursday, June 18, 2009 8:03 To: tz(a)lecserver.nci.nih.gov Subject: Updated file is not working[BDT to BDST] Hello, Updating with the given zoneinfo [Asia/Dhaka] datafile changing nothing but the time initial BDT to BDST. I've tried to edit the earlier data file [tzdata2009i.tar.gz] and with little change found following: $zdump -v /etc/localtime | grep 2009 /etc/localtime Fri Jun 19 16:59:59 2009 UTC = Fri Jun 19 22:59:59 2009 BDT isdst=0 gmtoff=21600 /etc/localtime Fri Jun 19 17:00:00 2009 UTC = Sat Jun 20 00:00:00 2009 BDST isdst=1 gmtoff=25200 /etc/localtime Tue Sep 29 16:59:59 2009 UTC = Tue Sep 29 23:59:59 2009 BDST isdst=1 gmtoff=25200 /etc/localtime Tue Sep 29 17:00:00 2009 UTC = Tue Sep 29 23:00:00 2009 BDT isdst=0 gmtoff=21600 #Here is the tzdata/asia file # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Bang 2009 only - Jan 1 0:00 0 - Rule Bang 2009 only - Jun 19 23:00 1:00 S Rule Bang 2009 only - Sep 30 00:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Dhaka 6:01:40 - LMT 1890 5:53:20 - HMT 1941 Oct # Howrah Mean Time? 6:30 - BURT 1942 May 15 # Burma Time 5:30 - IST 1942 Sep 6:30 - BURT 1951 Sep 30 6:00 - DACT 1971 Mar 26 # Dacca Time 6:00 Bang BD%sT But still having problem with backward. Thanks, -- Mohammed Zahid Hossain System Administrator & Head of Operation ====================================== Onenet Communications Limited(ABSCO) (The ISP division of OneTel) Bulu Ocean Tower (14th Floor) 40 Kemal Ataturk Avenue Banani, Dhaka-1213, Bangladesh. Tel: (880-2) 885-3164, 886-0861, 882-1486, 989-8391 Web: http://www.onenetbd.com/

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Updated file is not working[BDT to BDST]
by Mohammed Zahid Hossain June 18, 2009

June 18, 2009

Hello, Updating with the given zoneinfo [Asia/Dhaka] datafile changing nothing but the time initial BDT to BDST. I've tried to edit the earlier data file [tzdata2009i.tar.gz] and with little change found following: $zdump -v /etc/localtime | grep 2009 /etc/localtime Fri Jun 19 16:59:59 2009 UTC = Fri Jun 19 22:59:59 2009 BDT isdst=0 gmtoff=21600 /etc/localtime Fri Jun 19 17:00:00 2009 UTC = Sat Jun 20 00:00:00 2009 BDST isdst=1 gmtoff=25200 /etc/localtime Tue Sep 29 16:59:59 2009 UTC = Tue Sep 29 23:59:59 2009 BDST isdst=1 gmtoff=25200 /etc/localtime Tue Sep 29 17:00:00 2009 UTC = Tue Sep 29 23:00:00 2009 BDT isdst=0 gmtoff=21600 #Here is the tzdata/asia file # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Bang 2009 only - Jan 1 0:00 0 - Rule Bang 2009 only - Jun 19 23:00 1:00 S Rule Bang 2009 only - Sep 30 00:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Dhaka 6:01:40 - LMT 1890 5:53:20 - HMT 1941 Oct # Howrah Mean Time? 6:30 - BURT 1942 May 15 # Burma Time 5:30 - IST 1942 Sep 6:30 - BURT 1951 Sep 30 6:00 - DACT 1971 Mar 26 # Dacca Time 6:00 Bang BD%sT But still having problem with backward. Thanks, -- Mohammed Zahid Hossain System Administrator & Head of Operation ====================================== Onenet Communications Limited(ABSCO) (The ISP division of OneTel) Bulu Ocean Tower (14th Floor) 40 Kemal Ataturk Avenue Banani, Dhaka-1213, Bangladesh. Tel: (880-2) 885-3164, 886-0861, 882-1486, 989-8391 Web: http://www.onenetbd.com/

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Update URL for 2000/84/EC directive governing current EU DST
by Colin Watson June 18, 2009

June 18, 2009

The 'europe' file in tzdata-2009i has this link: # The most recent directive covers the years starting in 2002. See: # <a href="http://europa.eu.int/eur-lex/en/lif/dat/2000/en_300L0084.html"> # Directive 2000/84/EC of the European Parliament and of the Council # of 19 January 2001 on summer-time arrangements. # </a> The URL given there no longer works properly. Here's an updated one, which Ian Jackson found by way of a search engine: http://eur-lex.europa.eu/smartapi/cgi/sga_doc?smartapi!celexapi!prod!CELEXn… Thanks, -- Colin Watson [cjwatson(a)debian.org]

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Bolivia may change Time Zone from GMT-04 to GMT-05 in the winter.
by Alexander Krivenyshev June 17, 2009

June 17, 2009

According to various news reports Bolivia is considering to change Time Zone from GMT-04 to GMT-05 in the winter 2009/2010 to prevent the spread of colds and the new seasonal influenza A strain H1N1. It would be the first time in Bolivian history that changes the time zone. Analizan en Bolivia cambiar el huso horario de invierno para evitar gripes (spanish) http://www.adn.es/sociedad/20090616/NWS-1425-Analizan-Bolivia-invierno-hora… cambiar.html El Gobierno quiere frenar incremento de los resfríos cambiando el huso horario (spanish) http://www.erbol.com.bo/noticia1.php?identificador=1689&bdatos=notiportada1 or (Spanish) http://www.worldtimezone.com/dst_news/dst_news_bolivia01.html Alexander Krivenyshev, http://www.worldtimezone.com

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proposed time zone package change for Bangladesh
by Arthur David Olson June 17, 2009

June 17, 2009

First a note that tzdata2009i.tar.gz does seem to do the expected thing here on the mother system: Script started on Mon Jun 15 06:34:58 2009 lecserver$ ./zdump -v Asia/Dhaka | grep 2009 Asia/Dhaka Fri Jun 19 17:59:59 2009 UTC = Fri Jun 19 23:59:59 2009 BDT isdst=0 Asia/Dhaka Fri Jun 19 18:00:00 2009 UTC = Sat Jun 20 01:00:00 2009 BDST isdst=1 lecserver$ exit script done on Mon Jun 15 06:35:15 2009 However, given this morning's note about DST starting at 23:00... Finally we've got the official mail regarding DST start time where DST start time is mentioned as Jun 19 2009, 23:00 from BTRC (Bangladesh Telecommunication Regulatory Commission). No DST end date has been announced yet. ...and as a way to both simplify the change and avoid glitches, below find a proposed change to the "asia" file. Feedback both on the usefulness of the change and when to push it is welcome. --ado ------- asia ------- *** /tmp/geta26023 Mon Jun 15 06:44:15 2009 --- /tmp/getb26023 Mon Jun 15 06:44:15 2009 *************** *** 1,5 **** # <pre> ! # @(#)asia 8.34 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. --- 1,5 ---- # <pre> ! # @(#)asia 8.35 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. *************** *** 165,173 **** # http://www.timeanddate.com/news/time/bangladesh-daylight-saving-2009.html # </a> ! # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S ! Rule Bang 2009 only - Jan 1 0:00 0 - ! Rule Bang 2009 only - Jun 20 0:00 1:00 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Dhaka 6:01:40 - LMT 1890 --- 165,176 ---- # http://www.timeanddate.com/news/time/bangladesh-daylight-saving-2009.html # </a> ! # From A. N. M. Kamrus Saadat (2009-06-15): ! # Finally we've got the official mail regarding DST start time where DST start ! # time is mentioned as Jun 19 2009, 23:00 from BTRC (Bangladesh ! # Telecommunication Regulatory Commission). ! # ! # No DST end date has been announced yet. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Dhaka 6:01:40 - LMT 1890 *************** *** 176,183 **** 5:30 - IST 1942 Sep 6:30 - BURT 1951 Sep 30 6:00 - DACT 1971 Mar 26 # Dacca Time ! 6:00 - BDT 2009 # Bangladesh Time ! 6:00 Bang BD%sT # Bhutan # Zone NAME GMTOFF RULES FORMAT [UNTIL] --- 179,186 ---- 5:30 - IST 1942 Sep 6:30 - BURT 1951 Sep 30 6:00 - DACT 1971 Mar 26 # Dacca Time ! 6:00 - BDT 2009 Jun 19 23:00 # Bangladesh Time ! 6:00 1:00 BDST # Bhutan # Zone NAME GMTOFF RULES FORMAT [UNTIL]

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