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- DATE(1L) Misc. Reference Manual Pages DATE(1L)
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- NNNNAAAAMMMMEEEE
- date - print or set the system date and time
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- SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
- ddddaaaatttteeee [-u] [-d datestr] [-s datestr] [--uct] [--universal] [-
- - date=datestr] [--set=datestr] [--help] [--version] [+FOR-
- MAT] [MMDDhhmm[[CC]YY][.ss]]
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- DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
- This manual page documents the GNU version of ddddaaaatttteeee. ddddaaaatttteeee
- with no arguments prints the current time and date (in the
- format of the `%c' directive described below). If given an
- argument that starts with a `+', it prints the current time
- and date in a format controlled by that argument, which has
- the same format as the format string passed to the
- `strftime' function. Except for directives that start with
- `%', characters in that string are printed unchanged.
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- The directives are:
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- % a literal %
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- n a newline
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- t a horizontal tab
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- Time fields:
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- %H hour (00..23)
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- %I hour (01..12)
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- %k hour ( 0..23)
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- %l hour ( 1..12)
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- %M minute (00..59)
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- %p locale's AM or PM
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- %r time, 12-hour (hh:mm:ss [AP]M)
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- %s seconds since 00:00:00, Jan 1, 1970 (a nonstandard
- extension)
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- %S second (00..61)
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- %T time, 24-hour (hh:mm:ss)
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- %X locale's time representation (%H:%M:%S)
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- DATE(1L) Misc. Reference Manual Pages DATE(1L)
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- %Z time zone (e.g., EDT), or nothing if no time zone is
- determinable
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- Date fields:
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- %a locale's abbreviated weekday name (Sun..Sat)
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- %A locale's full weekday name, variable length
- (Sunday..Saturday)
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- %b locale's abbreviated month name (Jan..Dec)
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- %B locale's full month name, variable length
- (January..December)
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- %c locale's date and time (Sat Nov 04 12:02:33 EST 1989)
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- %d day of month (01..31)
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- %D date (mm/dd/yy)
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- %h same as %b
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- %j day of year (001..366)
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- %m month (01..12)
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- %U week number of year with Sunday as first day of week
- (00..53)
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- %w day of week (0..6) with 0 corresponding to Sunday
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- %W week number of year with Monday as first day of week
- (00..53)
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- %x locale's date representation (mm/dd/yy)
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- %y last two digits of year (00..99)
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- %Y year (1970...)
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- By default, ddddaaaatttteeee pads numeric fields with zeroes. GNU ddddaaaatttteeee
- recognizes the following nonstandard numeric modifiers:
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- - (hyphen) do not pad the field
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- _ (underscore) pad the field with spaces
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- If given an argument that does not start with `+', ddddaaaatttteeee sets
- the system clock to the time and date specified by that
- argument. The argument must consist entirely of digits,
- which have the following meaning:
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- MM month
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- DD day within month
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- hh hour
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- mm minute
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- CC first two digits of year (optional)
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- YY last two digits of year (optional)
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- ss second (optional)
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- Only the superuser can set the system clock.
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- OOOOPPPPTTTTIIIIOOOONNNNSSSS
- -_d _d_a_t_e_s_t_r, --_d_a_t_e _d_a_t_e_s_t_r
- Display the time and date specified in _d_a_t_e_s_t_r, which
- can be in almost any common format. The display is in
- the default output format, or if an argument starting
- with `+' is given to ddddaaaatttteeee, in the format specified by
- that argument.
-
- --_h_e_l_p
- Print a usage message on standard output and exit suc-
- cessfully.
-
- -_s _d_a_t_e_s_t_r, --_s_e_t _d_a_t_e_s_t_r
- Set the time and date to _d_a_t_e_s_t_r, which can be in
- almost any common format. It can contain month names,
- timezones, `am' and `pm', etc.
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- -_u, --_u_n_i_v_e_r_s_a_l
- Print or set the time and date in Universal Coordinated
- Time (also known as Greenwich Mean Time) instead of in
- local (wall clock) time.
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- --_v_e_r_s_i_o_n
- Print version information on standard output then exit
- successfully.
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- EEEEXXXXAAAAMMMMPPPPLLLLEEEESSSS
- To print the date of the day before yesterday
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- date --date '2 days ago'
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- To print the date of the day three months and one day hence
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- date --date '3 months 1 day'
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- DATE(1L) Misc. Reference Manual Pages DATE(1L)
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- To print the day of year of Christmas in the current year
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- date --date '25 Dec' +%j
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- To print the current date in a format including the full
- month name and the day of the month
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- date '+%B %d'
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- But this may not be what you want because for the first nine
- days of the month, the `%d' expands to a zero-padded two-
- digit field, for example `date -d 1-may '+%B %d'' will print
- `May 01'.
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- To print the same date but without the leading zero for
- one-digit days of month, you can use the nonstandard `-'
- modifier to suppress the padding altogether.
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- date -d 1-may '+%B %-d'
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