View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0000661 | 1003.1(2008)/Issue 7 | Base Definitions and Headers | public | 2013-02-18 16:41 | 2019-07-15 15:32 |
| Reporter | dangole | Assigned To | ajosey | ||
| Priority | normal | Severity | Objection | Type | Clarification Requested |
| Status | Closed | Resolution | Duplicate | ||
| Name | Daniel Golle | ||||
| Organization | |||||
| User Reference | https://bugs.busybox.net/show_bug.cgi?id=5936 | ||||
| Section | 8.3 Other Environment Variables, TZ variable | ||||
| Page Number | pubs.opengroup.org/onlinepubs/007904975/basedefs/xbd_chap08.html | ||||
| Line Number | 718-843 | ||||
| Interp Status | --- | ||||
| Final Accepted Text | |||||
| Summary | 0000661: gramar of TZ variable is insufficient for describing Israel Daylight-saving time | ||||
| Description | The gramar of the TZ variable doesn't allow one to refer to "the Friday before the last Sunday in March" and not at all to "the first Sunday after October 1. If the end of IDT falls on Rosh Hashanah, the Jewish New Year, then IDT will end on the first Monday after October 1". (from https://en.wikipedia.org/wiki/Israel_Summer_Time ) Obviously, it is possible to specify the rules for a specific year by just refering to the exact days. This would be sufficient if there was a method to define rules for more than just the current year. The IANA timezone database (tzdata, as used by glibc) provides another, more complex, gramar which is sufficient to express the day-light-saving rules. | ||||
| Desired Action | Extend the TZ variable gramar to be as expressive as the IANA tz database e.g. std offset dst offset, rule[@year[-endyear][, rule@year[-endyear]][, ...]] | ||||
| Tags | No tags attached. | ||||
| duplicate of | 0001252 | Closed | 1003.1(2016/18)/Issue7+TC2 | Extend TZ to allow times outside 00-24 range, permanent DST |
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Is this extended TZ form present in any existing implementations? If not, I think it might be better to follow existing near-universal practice and standardize the zoneinfo format and the use of relative or absolute zoneinfo pathnames in the TZ variable, rather than inventing a new solution (and thus requiring implementations that want to be both conforming and practical to support both this new form and zoneinfo). |
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Also please see Issue 001252 http://austingroupbugs.net/view.php?id=1252 which proposes a minor extension to the POSIX TZ spec that would handle current daylight-saving rules in Israel. |
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Is the jewish new year date based on the Gregorian calendar or is it based on the jewish moon calendar? |
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[Replying to joerg's comment.] Starting 2013-06-23 the Hebrew calendar is no longer used to determine daylight-saving transitions in the state of Israel, so the original bug report is no longer relevant for current Israeli practice. Current Israeli practice is to begin DST at 02:00 on the Friday before March's last Sunday, and to end DST at 02:00 on October's last Sunday. This can be specified via TZ='IST-2IDT,M3.4.4/26,M10.5.0' if one assumes the extensions proposed in Issue 001252 http://austingroupbugs.net/view.php?id=1252 to the TZ string. |
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Fixed by changes made for 0001252. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2013-02-18 16:41 | dangole | New Issue | |
| 2013-02-18 16:41 | dangole | Status | New => Under Review |
| 2013-02-18 16:41 | dangole | Assigned To | => ajosey |
| 2013-02-18 16:41 | dangole | Name | => Daniel Golle |
| 2013-02-18 16:41 | dangole | User Reference | => https://bugs.busybox.net/show_bug.cgi?id=5936 |
| 2013-02-18 16:41 | dangole | Section | => 8.3 Other Environment Variables, TZ variable |
| 2013-02-18 16:41 | dangole | Page Number | => pubs.opengroup.org/onlinepubs/007904975/basedefs/xbd_chap08.html |
| 2013-02-18 16:42 | dangole | Line Number | => 718-843 |
| 2013-02-18 18:29 | dalias | Note Added: 0001465 | |
| 2019-06-02 21:41 | eggert | Note Added: 0004402 | |
| 2019-06-02 21:42 | eggert | Note Edited: 0004402 | |
| 2019-06-02 21:56 | Don Cragun | Relationship added | related to 0001252 |
| 2019-06-06 14:52 | joerg | Note Added: 0004406 | |
| 2019-06-07 16:24 | eggert | Note Added: 0004409 | |
| 2019-07-15 15:30 | Don Cragun | Interp Status | => --- |
| 2019-07-15 15:30 | Don Cragun | Note Added: 0004484 | |
| 2019-07-15 15:31 | Don Cragun | Relationship replaced | duplicate of 0001252 |
| 2019-07-15 15:32 | Don Cragun | Status | Under Review => Closed |
| 2019-07-15 15:32 | Don Cragun | Resolution | Open => Duplicate |
