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date: --debug option not yet implemented #7342
Description
The date --debug option is not yet implemented. Here's an example of the output:
TZ=America/Belize date --debug -d 'TZ="Asia/Tokyo" Sun, 90-12-11 + 3 days - 90 minutes' +'%a %b %e %T %z %Y'
date: parsed day part: Sun (day ordinal=0 number=0)
date: parsed date part: (Y-M-D) 0090-12-11
date: parsed relative part: +3 day(s)
date: parsed relative part: +3 day(s) -90 minutes
date: input timezone: TZ="Asia/Tokyo" in date string
date: warning: adjusting year value 90 to 1990
date: warning: using midnight as starting time: 00:00:00
date: warning: day (Sun) ignored when explicit dates are given
date: starting date/time: '(Y-M-D) 1990-12-11 00:00:00'
date: warning: when adding relative days, it is recommended to specify noon
date: after date adjustment (+0 years, +0 months, +3 days),
date: new date/time = '(Y-M-D) 1990-12-14 00:00:00'
date: '(Y-M-D) 1990-12-14 00:00:00' = 661100400 epoch-seconds
date: after time adjustment (+0 hours, -90 minutes, +0 seconds, +0 ns),
date: new time = 661095000 epoch-seconds
date: timezone: TZ="Asia/Tokyo" environment value
date: final: 661095000.000000000 (epoch-seconds)
date: final: (Y-M-D) 1990-12-13 13:30:00 (UTC)
date: final: (Y-M-D) 1990-12-13 22:30:00 (UTC+09)
date: output format: ‘%a %b %e %T %z %Y’
Thu Dec 13 07:30:00 -0600 1990
Most of these messages would need to be implemented in the parse_datetime library, where the parsing happens.
Activity
ChrisDryden commentedon Feb 15, 2026
The debug flag was just added in #10940 some of the debug messages were added but there is still a bunch more to add
HackingRepo commentedon Jun 29, 2026
@sylvestre --debug have been implemented, close that
sylvestre commentedon Jun 29, 2026
we have the flag but we didn't implemented everything. the gnu test doesn't pass
xtqqczze commentedon Oct 13, 2026
Current output as of 1747ba1:
anastygnome commentedon Oct 21, 2026
It's parsing dependent, which is in the end language dependent, we should try to adapt it but imho we'll have to patch it. No one should rely on debug output but decs anyway