On 24/01/2023 16:09, Rafael Dulfer wrote:
The Git documentation <https://www.git-scm.com/docs/git-log#Documentation/git-log.txt---dateltformatgt> states that if no date format is given (or --date=default is given), the date format is similar to rfc2822 except of a few exceptions, of which those listed are:
* There is no comma after the day-of-week
* The time zone is omitted when the local time zone is used
However, if we were to compare the two date formats, you can see another difference:
git log --default -> Tue Jan 24 11:03:47 2023 +0100
git log --rfc -> Tue, 24 Jan 2023 11:03:47 +0100
It seems that options in these samples were mistyped. They are missing the "--date=" part:
$ git log -1 --date=default master | grep 'Date:'
Date: Sat Jan 21 16:35:14 2023 -0800
$ git log -1 --date=rfc2822 master | grep 'Date:'
Date: Sat, 21 Jan 2023 16:35:14 -0800
With the default, the month and day-of-month are switched around. From my own quick investigation, this behavior occurs because of the statement found at date.c#L266 <https://github.com/git/git/blob/56c8fb1e95377900ec9d53c07886022af0a5d3c2/date.c#L266> wherein the month is inserted before the day-of-month. I am unsure which behavior is exactly intended and whether this discrepancy was known, but it would probably be a good idea to have a note of it in the documentation.
Indeed, the description of the option (which comes from Documentation/rev-list-options.txt) doesn't describe all differences
between --date=default and --date=rfc2822.
A fuller list could be:
* There is no comma after the day-of-week
* The time zone is omitted when the local time zone is used
* Day-of-month and month are switched around
* Time-of-day and the year are switched around
CC'ing Peff, who wrote the list of exceptions in add00ba2de (date: make "local" orthogonal to date format, 2015-09-03).