Display the current time in the given FORMAT, or set the system date.
- -d, --date=STRING
- display time described by STRING, not `now'
- -f, --file=DATEFILE
- like --date once for each line of DATEFILE
- -I, --iso-8601[=TIMESPEC] output an ISO-8601 compliant date/time string.
- TIMESPEC=`date' (or missing) for date only,
`hours', `minutes', or `seconds' for date and
time to the indicated precision.
- -r, --reference=FILE
- display the last modification time of FILE
- -R, --rfc-822
- output RFC-822 compliant date string
- -s, --set=STRING
- set time described by STRING
- -u, --utc, --universal
- print or set Coordinated Universal Time
- --help
- display this help and exit
- --version
- output version information and exit
FORMAT controls the output. The only valid option for the second form
specifies Coordinated Universal Time. Interpreted sequences are:
- %%
- a literal %
- %a
- locale's abbreviated weekday name (Sun..Sat)
- %A
- locale's full weekday name, variable length (Sunday..Saturday)
- %b
- locale's abbreviated month name (Jan..Dec)
- %B
- locale's full month name, variable length (January..December)
- %c
- locale's date and time (Sat Nov 04 12:02:33 EST 1989)
- %d
- day of month (01..31)
- %D
- date (mm/dd/yy)
- %e
- day of month, blank padded ( 1..31)
- %h
- same as %b
- %H
- hour (00..23)
- %I
- hour (01..12)
- %j
- day of year (001..366)
- %k
- hour ( 0..23)
- %l
- hour ( 1..12)
- %m
- month (01..12)
- %M
- minute (00..59)
- %n
- a newline
- %p
- locale's AM or PM
- %r
- time, 12-hour (hh:mm:ss [AP]M)
- %s
- seconds since 00:00:00, Jan 1, 1970 (a GNU extension)
- %S
- second (00..60)
- %t
- a horizontal tab
- %T
- time, 24-hour (hh:mm:ss)
- %U
- week number of year with Sunday as first day of week (00..53)
- %V
- week number of year with Monday as first day of week (01..52)
- %w
- day of week (0..6); 0 represents Sunday
- %W
- week number of year with Monday as first day of week (00..53)
- %x
- locale's date representation (mm/dd/yy)
- %X
- locale's time representation (%H:%M:%S)
- %y
- last two digits of year (00..99)
- %Y
- year (1970...)
- %z
- RFC-822 style numeric timezone (-0500) (a nonstandard extension)
- %Z
- time zone (e.g., EDT), or nothing if no time zone is determinable
By default, date pads numeric fields with zeroes. GNU date recognizes
the following modifiers between `%' and a numeric directive.
- `-' (hyphen) do not pad the field
`_' (underscore) pad the field with spaces
