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- DATE(1L) DATE(1L)
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- NNAAMMEE
- date - print or set the system date and time
-
- SSYYNNOOPPSSIISS
- ddaattee [-u] [-d datestr] [-s datestr] [--utc] [--universal]
- [--date=datestr] [--set=datestr] [--help] [--version]
- [+FORMAT] [MMDDhhmm[[CC]YY][.ss]]
-
-
- DDEESSCCRRIIPPTTIIOONN
- This manual page documents the GNU version of ddaattee. ddaattee
- 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.
-
- The directives are:
-
- % a literal %
-
- n a newline
-
- t a horizontal tab
-
- Time fields:
-
- %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 1970-01-01 00:00:00 UTC (a nonstan-
- dard 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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- %Z time zone (e.g., EDT), or nothing if no time zone
- is determinable
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- FSF GNU Shell Utilities 1
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- DATE(1L) DATE(1L)
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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 (Sun-
- day..Saturday)
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- %b locale's abbreviated month name (Jan..Dec)
-
- %B locale's full month name, variable length (Jan-
- uary..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, ddaattee pads numeric fields with zeroes. GNU
- ddaattee recognizes the following nonstandard numeric modi-
- fiers:
-
- - (hyphen) do not pad the field
-
- _ (underscore) pad the field with spaces
-
- If given an argument that does not start with `+', ddaattee
- sets the system clock to the time and date specified by
- that argument. The argument must consist entirely of dig-
- its, which have the following meaning:
-
- MM month
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- FSF GNU Shell Utilities 2
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- DATE(1L) DATE(1L)
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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.
-
- OOPPTTIIOONNSS
- _-_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 dis-
- play is in the default output format, or if an
- argument starting with `+' is given to ddaattee, in the
- format specified by that argument.
-
- _-_-_h_e_l_p Print a usage message on standard output and exit
- successfully.
-
- _-_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.
-
- _-_u_, _-_-_u_n_i_v_e_r_s_a_l
- Print or set the time and date in Coordinated Uni-
- versal Time (also known as Greenwich Mean Time)
- instead of in local (wall clock) time.
-
- _-_-_v_e_r_s_i_o_n
- Print version information on standard output then
- exit successfully.
-
- EEXXAAMMPPLLEESS
- To print the date of the day before yesterday
-
- date --date '2 days ago'
-
- To print the date of the day three months and one day
- hence
-
- date --date '3 months 1 day'
-
- To print the day of year of Christmas in the current year
-
- date --date '25 Dec' +%j
-
- To print the current date in a format including the full
-
-
-
- FSF GNU Shell Utilities 3
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- DATE(1L) DATE(1L)
-
-
- month name and the day of the month
-
- date '+%B %d'
-
- 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'.
-
- 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.
-
- date -d 1-may '+%B %-d'
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- FSF GNU Shell Utilities 4
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