/usr/bin/date

Print or set the system date and time

Usage: date [OPTION]... [+FORMAT]...
       date [OPTION]... [MMDDhhmm[[CC]YY][.ss]]

       FORMAT controls the output.  Interpreted sequences are:
       | Sequence | Description                                                          | Example                |
       | -------- | -------------------------------------------------------------------- | ---------------------- |
       | %%       | a literal %                                                          | %                      |
       | %a       | locale's abbreviated weekday name                                    | Sun                    |
       | %A       | locale's full weekday name                                           | Sunday                 |
       | %b       | locale's abbreviated month name                                      | Jan                    |
       | %B       | locale's full month name                                             | January                |
       | %c       | locale's date and time                                               | Thu Mar 3 23:05:25 2005|
       | %C       | century; like %Y, except omit last two digits                        | 20                     |
       | %d       | day of month                                                         | 01                     |
       | %D       | date; same as %m/%d/%y                                               | 12/31/99               |
       | %e       | day of month, space padded; same as %_d                              | 3                      |
       | %F       | full date; same as %Y-%m-%d                                          | 2005-03-03             |
       | %g       | last two digits of year of ISO week number (see %G)                  | 05                     |
       | %G       | year of ISO week number (see %V); normally useful only with %V       | 2005                   |
       | %h       | same as %b                                                           | Jan                    |
       | %H       | hour (00..23)                                                        | 23                     |
       | %I       | hour (01..12)                                                        | 11                     |
       | %j       | day of year (001..366)                                               | 062                    |
       | %k       | hour, space padded ( 0..23); same as %_H                             |  3                     |
       | %l       | hour, space padded ( 1..12); same as %_I                             |  9                     |
       | %m       | month (01..12)                                                       | 03                     |
       | %M       | minute (00..59)                                                      | 30                     |
       | %n       | a newline                                                            | \n                     |
       | %N       | nanoseconds (000000000..999999999)                                   | 123456789              |
       | %p       | locale's equivalent of either AM or PM; blank if not known           | PM                     |
       | %P       | like %p, but lower case                                              | pm                     |
       | %q       | quarter of year (1..4)                                               | 1                      |
       | %r       | locale's 12-hour clock time                                          | 11:11:04 PM            |
       | %R       | 24-hour hour and minute; same as %H:%M                               | 23:30                  |
       | %s       | seconds since 1970-01-01 00:00:00 UTC                                | 1615432800             |
       | %S       | second (00..60)                                                      | 30                     |
       | %t       | a tab                                                                | \t                     |
       | %T       | time; same as %H:%M:%S                                               | 23:30:30               |
       | %u       | day of week (1..7); 1 is Monday                                      | 4                      |
       | %U       | week number of year, with Sunday as first day of week (00..53)       | 10                     |
       | %V       | ISO week number, with Monday as first day of week (01..53)           | 12                     |
       | %w       | day of week (0..6); 0 is Sunday                                      | 4                      |
       | %W       | week number of year, with Monday as first day of week (00..53)       | 11                     |
       | %x       | locale's date representation                                         | 03/03/2005             |
       | %X       | locale's time representation                                         | 23:30:30               |
       | %y       | last two digits of year (00..99)                                     | 05                     |
       | %Y       | year                                                                 | 2005                   |
       | %z       | +hhmm numeric time zone                                              | -0400                  |
       | %:z      | +hh:mm numeric time zone                                             | -04:00                 |
       | %::z     | +hh:mm:ss numeric time zone                                          | -04:00:00              |
       | %:::z    | numeric time zone with : to necessary precision                      | -04, +05:30            |
       | %Z       | alphabetic time zone abbreviation                                    | EDT                    |

       By default, date pads numeric fields with zeroes.
       The following optional flags may follow '%':
       * `-` (hyphen) do not pad the field
       * `_` (underscore) pad with spaces
       * `0` (zero) pad with zeros
       * `^` use upper case if possible
       * `#` use opposite case if possible
       After any flags comes an optional field width, as a decimal number;
       then an optional modifier, which is either
       * `E` to use the locale's alternate representations if available, or
       * `O` to use the locale's alternate numeric symbols if available.
       Examples:
         Convert seconds since the epoch (1970-01-01 UTC) to a date

         date --date='@2147483647'

         Show the time on the west coast of the US (use tzselect(1) to find TZ)

         TZ='America/Los_Angeles' date

Arguments:
  [format]...

Options:
  -d, --date <STRING>     display time described by STRING, not 'now'
  -f, --file <DATEFILE>   like --date; once for each line of DATEFILE
  -I, --iso-8601 [<FMT>]  output date/time in ISO 8601 format.
                          FMT='date' for date only (the default),
                          'hours', 'minutes', 'seconds', or 'ns'
                          for date and time to the indicated precision.
                          Example: 2006-08-14T02:34:56-06:00 [possible values: date, hours, minutes,
                          seconds, ns]
      --resolution        output the available resolution of timestamps
                          Example: 0.000000001
  -R, --rfc-email         output date and time in RFC 5322 format.
                          Example: Mon, 14 Aug 2006 02:34:56 -0600
      --rfc-3339 <FMT>    output date/time in RFC 3339 format.
                          FMT='date', 'seconds', or 'ns'
                          for date and time to the indicated precision.
                          Example: 2006-08-14 02:34:56-06:00 [possible values: date, seconds, ns]
      --debug             annotate the parsed date, and warn about questionable usage to stderr
  -r, --reference <FILE>  display the last modification time of FILE
  -s, --set <STRING>      set time described by STRING
  -u, --universal         print or set Coordinated Universal Time (UTC) [alias: --utc]
  -h, --help              Print help
  -V, --version           Print version