Format date and time for Linux shell script or variable

%a     locale’s abbreviated weekday title (e.g., Solar)

%A     locale’s full weekday title (e.g., Sunday)

%b     locale’s abbreviated month title (e.g., Jan)

%B     locale’s full month title (e.g., January)

%c     locale’s date and time (e.g., Thu Mar  three 23:05:25 2005)

%C     century; like %Y, besides omit final two digits (e.g., 20)

%d     day of month (e.g, 01)

%D     date; similar as %m/%d/%y

%e     day of month, house padded; similar as %_d

%F     full date; similar as %Y–%m–%d

%g     final two digits of 12 months of ISO week quantity (see %G)

%G     12 months of ISO week quantity (see %V); usually helpful solely with %V

%h     similar as %b

%H     hour (00..23)

%I     hour (01..12)

%j     day of 12 months (001..366)

%ok     hour ( zero..23)

%l     hour ( 1..12)

%m     month (01..12)

%M     minute (00..59)

%N     nanoseconds (000000000..999999999)

%p     locale’s equal of both AM or PM; clean if not identified

%P     like %p, however decrease case

%r     locale’s 12–hour clock time (e.g., 11:11:04 PM)

%R     24–hour hour and minute; similar as %H:%M

%s     seconds since 1970–01–01 00:00:00 UTC

%S     second (00..60)

%T     time; similar as %H:%M:%S

%u     day of week (1..7); 1 is Monday

%U     week quantity of 12 months, with Sunday as first day of week (00..53)

%V     ISO week quantity, with Monday as first day of week (01..53)

%w     day of week (zero..6); zero is Sunday

%W     week quantity of 12 months, with Monday as first day of week (00..53)

%x     locale’s date illustration (e.g., 12/31/99)

%X     locale’s time illustration (e.g., 23:13:48)

%y     final two digits of 12 months (00..99)

%Y     12 months

%z     +hhmm numeric timezone (e.g., –0400)

%:z    +hh:mm numeric timezone (e.g., –04:00)

%::z   +hh:mm:ss numeric time zone (e.g., –04:00:00)

%Z     alphabetic time zone abbreviation (e.g., EDT)

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