coreutils: Time conversion specifiers
21.1.1 Time conversion specifiers
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‘date’ conversion specifiers related to times.
‘%H’
hour (‘00’...‘23’)
‘%I’
hour (‘01’...‘12’)
‘%k’
hour, space padded (‘ 0’...‘23’); equivalent to ‘%_H’. This is a
GNU extension.
‘%l’
hour, space padded (‘ 1’...‘12’); equivalent to ‘%_I’. This is a
GNU extension.
‘%M’
minute (‘00’...‘59’)
‘%N’
nanoseconds (‘000000000’...‘999999999’). This is a GNU extension.
‘%p’
locale’s equivalent of either ‘AM’ or ‘PM’; blank in many locales.
Noon is treated as ‘PM’ and midnight as ‘AM’.
‘%P’
like ‘%p’, except lower case. This is a GNU extension.
‘%r’
locale’s 12-hour clock time (e.g., ‘11:11:04 PM’)
‘%R’
24-hour hour and minute. Same as ‘%H:%M’.
‘%s’
seconds since the epoch, i.e., since 1970-01-01 00:00:00 UTC. Leap
seconds are not counted unless leap second support is available.
⇒%s-examples, for examples. This is a GNU extension.
‘%S’
second (‘00’...‘60’). This may be ‘60’ if leap seconds are
supported.
‘%T’
24-hour hour, minute, and second. Same as ‘%H:%M:%S’.
‘%X’
locale’s time representation (e.g., ‘23:13:48’)
‘%z’
Four-digit numeric time zone, e.g., ‘-0600’ or ‘+0530’, or ‘-0000’
if no time zone is determinable. This value reflects the numeric
time zone appropriate for the current time, using the time zone
rules specified by the ‘TZ’ environment variable. A time zone is
not determinable if its numeric offset is zero and its abbreviation
begins with ‘-’. The time (and optionally, the time zone rules)
can be overridden by the ‘--date’ option.
‘%:z’
Numeric time zone with ‘:’, e.g., ‘-06:00’ or ‘+05:30’), or
‘-00:00’ if no time zone is determinable. This is a GNU extension.
‘%::z’
Numeric time zone to the nearest second with ‘:’ (e.g., ‘-06:00:00’
or ‘+05:30:00’), or ‘-00:00:00’ if no time zone is determinable.
This is a GNU extension.
‘%:::z’
Numeric time zone with ‘:’ using the minimum necessary precision
(e.g., ‘-06’, ‘+05:30’, or ‘-04:56:02’), or ‘-00’ if no time zone
is determinable. This is a GNU extension.
‘%Z’
alphabetic time zone abbreviation (e.g., ‘EDT’), or nothing if no
time zone is determinable. See ‘%z’ for how it is determined.