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21.1.1 Time conversion specifiers

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 UTC. Leap seconds are not counted unless leap second support is available. See %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.


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