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master bc4cbbcc57 4/7: Add nndiary-headers obsolescence comment
From: |
Paul Eggert |
Subject: |
master bc4cbbcc57 4/7: Add nndiary-headers obsolescence comment |
Date: |
Fri, 30 Dec 2022 00:32:26 -0500 (EST) |
branch: master
commit bc4cbbcc57a56a23c64576c8c23ecf6afb1c747b
Author: Paul Eggert <eggert@cs.ucla.edu>
Commit: Paul Eggert <eggert@cs.ucla.edu>
Add nndiary-headers obsolescence comment
* lisp/gnus/nndiary.el (nndiary-headers): Add comment
about alphabetic time zone names being obsolescent.
---
lisp/gnus/nndiary.el | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/lisp/gnus/nndiary.el b/lisp/gnus/nndiary.el
index ab9c6dd74f..e3fb5d8f87 100644
--- a/lisp/gnus/nndiary.el
+++ b/lisp/gnus/nndiary.el
@@ -339,8 +339,15 @@ all. This may very well take some time.")
;; for this header) or one list (specifying all the possible values for this
;; header). In the latter case, the list does NOT include the unspecified
;; spec (*).
+
;; For time zone values, we have symbolic time zone names associated with
;; the (relative) number of seconds ahead GMT.
+ ;; The list of time zone values is obsolescent, and new code should
+ ;; not rely on it. Many of the time zone abbreviations are wrong;
+ ;; in particular, all single-letter abbreviations other than "Z" have
+ ;; been wrong since Internet RFC 2822 (2001). However, the
+ ;; abbreviations have not been changed due to backward compatibility
+ ;; concerns.
)
(defsubst nndiary-schedule ()
- master updated (91ae9f3d12 -> 9153cf8158), Paul Eggert, 2022/12/30
- master 523261b454 6/7: Document calc-time-zone abbreviation obsolescence, Paul Eggert, 2022/12/30
- master 007e66bccb 5/7: Use RFC 822 abbrevs in sunrise-sunset strings, Paul Eggert, 2022/12/30
- master 8c13e84978 1/7: Fix newsticker timezone decode, Paul Eggert, 2022/12/30
- master 73769dc2b8 2/7: In cal-dst, be consistent re default to UTC, Paul Eggert, 2022/12/30
- master bc4cbbcc57 4/7: Add nndiary-headers obsolescence comment,
Paul Eggert <=
- master d11e34ce76 3/7: Default mbox "From " time zone to -0000, Paul Eggert, 2022/12/30
- master 9153cf8158 7/7: Avoid some obsolescent tz abbrevs in doc., Paul Eggert, 2022/12/30