- tz - lists.iana.org

Jordan DST change
by Mierzejewski, Dominik Dec. 12, 2013

Dec. 12, 2013

Dear time zone data maintainers, Jordan will return to UTC+2 on Dec 20th at 00:00 (clocks will be set back one hour to 23:00). Additionally, the previous rules for DST will return. This decision was made yesterday: http://home.telfort.nl/~t876506/TZworld.html#mea http://www.petra.gov.jo/Public_News/Nws_NewsDetails.aspx?lang=2&site_id=1&N… Regards, -- Dominik Mierzejewski dominik.mierzejewski(a)citi.com

1 0

Jordan back from DST - reverting to UTC+2
by Steffen Thorsen Dec. 11, 2013

Dec. 11, 2013

Jordan Times and other sources say that Jordan is going back to UTC+2 on 2013-12-19 at midnight: http://jordantimes.com/govt-decides-to-switch-back-to-wintertime (in English) Official, in Arabic: http://www.petra.gov.jo/public_news/Nws_NewsDetails.aspx?Menu_ID=&Site_Id=2… We assume they mean going back from 2013-12-20 00:00 to 2013-12-19 23:00, but it could also be one hour later, which is what they have normally done in the past. Based on the wording in the article, they call it coming back to winter time, so I think it would be best to change the Rules for Jordan and Zone for Amman, so it says DST started back in March 2012, never ended for the 2012/2013 winter and lasted all to December 2013. (Our background/permalink about it http://www.timeanddate.com/news/time/jordan-reverses-dst-decision.html ) Best regards, Steffen Thorsen - timeanddate.com

2 3

Re: [tz] open source .net tz compiler
by chris dostert Dec. 8, 2013

Dec. 8, 2013

I recently wrote a compiler for the tz Database written in C#, the source code for which I have made available at: https://github.com/appease/TimeZoneDb As there are no others for .net listed at http://www.iana.org/time-zones/repository/tz-link.html I thought I would reach out and ask about getting this added to the "Other tz compilers" section of the document in order to help anyone looking to consume the tz database from .net Best, -CD

5 4

Time zone in the news
by Arthur David Olson Nov. 19, 2013

Nov. 19, 2013

The 2013-11-04 New Yorker includes "New York Time," a story on an effort to repeal New York City DST laws that differ from US law. The online-but-paywalled link: http://www.newyorker.com/talk/2013/11/04/131104ta_talk_mcgrath @dashdashado

8 7

Local time from lat, lon and UTC
by dusan pecek Nov. 15, 2013

Nov. 15, 2013

Hi, not sure if this is the right place but I will ask anyhow. I am interested in calculation of local time from lat, lon and UTC (ZULU). It basically means that local time in the past can be calculated. Does your database enable to do that. Kind Regards, Dusan

5 4

Re: [tz] Local time from lat, lon and UTC
by Bennett Todd Nov. 15, 2013

Nov. 15, 2013

On Nov 14, 2013 3:33 AM, "dusan pecek" <dusan.pecek(a)gmail.com> wrote: > > Hi, not sure if this is the right place but I will ask anyhow. > I am interested in calculation of local time from lat, lon and UTC (ZULU). > It basically means that local time in the past can be calculated. > Does your database enable to do that. I for one think this list is a fine place to ask that question. The links I've seen others post in reply cover the answer, but to summarize, the zoneinfo database is necessary but not sufficient. It documents the rules for timezone changes, including but not limited to summer time AKA "daylight savings" for regions that share a common rule. The key for lookups in this database is often of the form continent/city, e.g. I'm in America/New_York. Most rules have many keys. But a separate database (and separate code) is needed to learn what rule covers (or contains) a given location as might be specified by latitude and longitude.

1 0

Wrong Cuba date in 2004
by Steffen Thorsen Nov. 13, 2013

Nov. 13, 2013

It appears the wrong date for DST start in Cuba in 2004 is in the database. It does not follow the same rules as the years before. The correct date should be Sunday 2004-03-28 00:00 ("Mar lastSun" rather than "Apr Sun>=1"). Richard Andersen (TT) (which I believe is also on this list) pointed out the difference between http://www.timeanddate.com/worldclock/timezone.html?n=99&syear=2000 and the IANA rules for Cuba, which led me to investigate. It appears I fixed this back when this was announced that year but unfortunately never reported it here. We've recorded an old granma.cu article, now long gone: http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html But fortunately still available through the Wayback Machine: https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/200… Loosely translated to: "On Saturday, March 27 at midnight [end of day] clocks are moved ahead one hour, to begin this traditional schedule." Best regards, Steffen Thorsen - timeanddate.com

2 1

http://wedontneeddst.com/
by Antony Seedhouse Nov. 9, 2013

Nov. 9, 2013

Noticed http://wedontneeddst.com/ come up on /r/web_design of all places http://www.reddit.com/r/web_design/comments/1q7ewp/excellent_design_and_use… Best regards, Antony

1 0

Time zones in the news
by Arthur David Olson Nov. 7, 2013

Nov. 7, 2013

Coverage of the Han/Uighur situation (familiar to long-time readers of the time zone mailing list): "China Only Has One Time Zone—and That's a Problem" http://www.theatlantic.com/china/archive/2013/11/china-only-has-one-time-zo… @dashdashado

1 0

Time zones in the "news"
by Arthur David Olson Nov. 6, 2013

Nov. 6, 2013

Eagerly awaiting a "northamericanew" containing "Rule Syrup." "The U.S. Needs To Retire Daylight Savings Time And Just Have 19 Time Zones—Nine Minutes Apart" http://www.theawl.com/2013/11/the-u-s-needs-to-retire-daylight-savings-time… @dashdashado

1 0