I can confirm that this is still the case... On an ubuntu 20.04: ``` ard@lenny:~$ TZ=US/Eastern date Mon Mar 29 09:08:43 EDT 2021 ard@lenny:~$ TZ=America/New_York date Mon Mar 29 09:08:47 EDT 2021 ard@lenny:~$ TZ=EDT date Mon Mar 29 13:08:51 EDT 2021 ard@lenny:~$ TZ=EST date Mon Mar 29 08:16:16 EST 2021 ard@lenny:~$ TZ=NNN date Mon Mar 29 13:16:26 NNN 2021 ard@lenny:~$ TZ=NNNN date Mon Mar 29 13:16:31 NNNN 2021 ``` on trusty: ``` ard@trusty:~$ TZ=EDT date Mon Mar 29 13:17:27 EDT 2021 ard@trusty:~$ TZ=US/Eastern date Mon Mar 29 09:17:38 EDT 2021 ard@trusty:~$ TZ=EST date Mon Mar 29 08:17:45 EST 2021 ard@trusty:~$ TZ=NNNN date Mon Mar 29 13:17:51 NNNN 2021 ard@trusty:~$ TZ=America/New_York date Mon Mar 29 09:18:27 EDT 2021 ard@trusty:~$ TZ=xxx date Mon Mar 29 13:18:46 xxx 2021 ard@trusty:~$ TZ=xxxxxxx date Mon Mar 29 13:18:50 xxxxxxx 2021 ard@trusty:~$ TZ=CET date Mon Mar 29 15:19:30 CEST 2021 ard@trusty:~$ TZ=CEST date Mon Mar 29 13:19:34 CEST 2021 ard@trusty:~$ TZ=UTC date Mon Mar 29 13:21:31 UTC 2021
``` So timezone setting using the name EDT are broken. The only way to get EDT is to use US/Eastern or America/New_York . Personally I think it's a bug to not accept EDT (might be ambiguous), and an even bigger bug to just echo the TZ if the TZ is actually unknown. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to coreutils in Ubuntu. https://bugs.launchpad.net/bugs/1452314 Title: TZ=EDT date reporting misleading times Status in coreutils package in Ubuntu: New Bug description: While working in a UTC system I stumbled upon some oddities with the date command, that at least appear to differ from how BSD systems report (correctly) when EDT or gibberish is passed to date via the TZ env variable. Currently I am in EST timezone, which during daylight savings time, is EDT. If I run date with "TZ=", I get changes in timezones used by date as expected, but noticed that EDT was actually returning UTC time, but displays "EDT" (so 10am becomes 2pm) despite actually displaying UTC. As a test, I also tried supply a bunch of gibberish only to find that BSD actually replaces the gibberish with the text "UTC", while linux systems just spit back the same gibberish (ie: TZ=jhsdjflhljak date), but report it in UTC time. So in the case where a user supplies a valid timezone such as EDT, one can make time related mistakes as linux will actually report UTC but use the label the user supplied. What is worse, is that Ubuntu actually shows my current time zone as "EDT" yet it isn't recognized as a valid zone! Here are some same outputs to clarify the problem on linux and bsd: Freebsd: [dan@barley ~]$ TZ=UTC date Wed May 6 15:09:26 UTC 2015 [dan@barley ~]$ TZ=EST date Wed May 6 10:09:32 EST 2015 [dan@barley ~]$ TZ=EDT date Wed May 6 15:09:39 UTC 2015 [dan@barley ~]$ TZ=lkjhsd date Wed May 6 15:11:16 UTC 2015 <==== good, correctly informs me what its reporting Ubuntu 14.04: dan@wks:~$ TZ=UTC date Wed May 6 15:10:48 UTC 2015 dan@wks:~$ TZ=EST date Wed May 6 10:10:48 EST 2015 dan@wks:~$ TZ=EDT date Wed May 6 15:10:48 EDT 2015 <==== EDT = UTC?! dan@wks:~$ date Wed May 6 11:10:56 EDT 2015 <==== the real EDT time dan@wks:~$ TZ=lkjhsd date Wed May 6 15:11:30 lkjhsd 2015 <===== wth? ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: coreutils 8.21-1ubuntu5.1 ProcVersionSignature: Ubuntu 3.13.0-46.79-generic 3.13.11-ckt15 Uname: Linux 3.13.0-46-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.14.1-0ubuntu3.10 Architecture: amd64 CurrentDesktop: XFCE Date: Wed May 6 11:01:37 2015 InstallationDate: Installed on 2014-06-11 (329 days ago) InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2) SourcePackage: coreutils UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/coreutils/+bug/1452314/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
