1CONVDATE(1)               InterNetNews Documentation               CONVDATE(1)
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NAME

6       convdate - Convert to/from RFC 5322 dates and seconds since epoch
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SYNOPSIS

9       convdate [-dhl] [-c | -n | -s] [date ...]
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DESCRIPTION

12       convdate translates the date/time strings given on the command line,
13       outputting the results one to a line.  The input can either be a date
14       in RFC 5322 format (accepting the variations on that format that
15       innd(8) is willing to accept), or the number of seconds since epoch (if
16       -c is given).  The output is either ctime(3) results, the number of
17       seconds since epoch, or a Usenet Date: header, depending on the options
18       given.
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20       If date is not given, convdate outputs the current date.
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OPTIONS

23       -c  Each argument is taken to be the number of seconds since epoch (a
24           time_t) rather than a date.
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26       -d  Output a valid Usenet Date: header instead of the results of
27           ctime(3) for each date given on the command line.  This is useful
28           for testing the algorithm used to generate Date: headers for local
29           posts.  Normally, the date will be in UTC, but see the -l option.
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31       -h  Print usage information and exit.
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33       -l  Only makes sense in combination with -d.  If given, Date: headers
34           generated will use the local time zone instead of UTC.
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36       -n  Rather than outputting the results of ctime(3) or a Date: header,
37           output each date given as the number of seconds since epoch (a
38           time_t).  This option doesn't make sense in combination with -d.
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40       -s  Pass each given date to the RFC 5322 date parser and print the
41           results of ctime(3) (or a Date: header if -d is given).  This is
42           the default behavior.
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EXAMPLES

45       Most of these examples are taken, with modifications from the original
46       man page dating from 1991 and were run in the EST/EDT time zone.
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48           % convdate '10 Feb 1991 10:00:00 -0500'
49           Sun Feb 10 10:00:00 1991
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51           % convdate '13 Dec 91 12:00 EST' '04 May 1990 0:0:0'
52           Fri Dec 13 12:00:00 1991
53           Fri May  4 00:00:00 1990
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55           % convdate -n '10 feb 1991 10:00' '4 May 90 12:00'
56           666198000
57           641880000
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59           % convdate -c 666198000
60           Sun Feb 10 10:00:00 1991
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62       ctime(3) results are in the local time zone.  Compare to:
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64           % convdate -dc 666198000
65           Sun, 10 Feb 1991 15:00:00 -0000 (UTC)
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67           % env TZ=PST8PDT convdate -dlc 666198000
68           Sun, 10 Feb 1991 07:00:00 -0800 (PST)
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70           % env TZ=EST5EDT convdate -dlc 666198000
71           Sun, 10 Feb 1991 10:00:00 -0500 (EST)
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73       The system library functions generally use the environment variable TZ
74       to determine (or at least override) the local time zone.
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HISTORY

77       Written by Rich $alz <rsalz@uunet.uu.net>, rewritten and updated by
78       Russ Allbery <eagle@eyrie.org> for the -d and -l flags.
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SEE ALSO

81       active.times(5).
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85INN 2.6.5                         2022-01-23                       CONVDATE(1)
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