date invocation (GNU Coreutils 9.0)
21.1 date: Print or set system date and time
date [option]… [+format] date [-u|--utc|--universal] [ MMDDhhmm[[CC]YY][.ss] ]
date with no
format argument is equivalent to invoking it with a default format that depends on the
LC_TIME locale category. In the default C locale, this format is ‘
'+%a %b %e %H:%M:%S %Z %Y'’, so the output looks like ‘
Thu Jul 9 17:00:00 EDT 2020’.
date uses the time zone rules indicated by the
TZ environment variable, or the system default rules if
TZ is not set. See Specifying the Time Zone with TZ in The GNU C Library Reference Manual.
If given an argument that starts with a ‘
date prints the current date and time (or the date and time specified by the
--date option, see below) in the format defined by that argument, which is similar to that of the
strftime function. Except for conversion specifiers, which start with ‘
%’, characters in the format string are printed unchanged. The conversion specifiers are described below.
An exit status of zero indicates success, and a nonzero value indicates failure.
|• Time conversion specifiers||%[HIklMNpPrRsSTXzZ]|
|• Date conversion specifiers||%[aAbBcCdDeFgGhjmuUVwWxyY]|
|• Literal conversion specifiers||%[%nt]|
|• Padding and other flags||Pad with zeros, spaces, etc.|
|• Setting the time||Changing the system clock.|
|• Options for date||Instead of the current time.|
|• Date input formats||Specifying date strings.|
|• Examples of date||Examples.|