Shenanigans

%%     a literal %

%a     locale’s abbreviated weekday name (e.g., Sun)

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

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

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

%c     locale’s date and time (e.g., Thu Mar  3 23:05:25 2005)

%C     century; like %Y, except omit last two digits (e.g., 21)

%d     day of month (e.g, 01)

%D     date; same as %m/%d/%y

%e     day of month, space padded; same as %_d

%F     full date; same as %Y-%m-%d

%g     last two digits of year of ISO week number (see %G)

%G     year of ISO week number (see %V); normally useful only with %V

%h     same as %b

%H     hour (00..23)

%I     hour (01..12)

%j     day of year (001..366)

%k     hour ( 0..23)

%l     hour ( 1..12)

%m     month (01..12)

%M     minute (00..59)

%n     a newline

%N     nanoseconds (000000000..999999999)

%p     locale’s equivalent of either AM or PM; blank if not known

%P     like %p, but lower case

%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 1970-01-01 00:00:00 UTC

%S     second (00..60)

%t     a tab

%T     time; same as %H:%M:%S

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

%U     week number of year, with Sunday as first day of week (00..53)

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

%w     day of week (0..6); 0 is Sunday

%W     week number of year, with Monday as first day of week (00..53)

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

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

%y     last two digits of year (00..99)

%Y     year

%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  numeric time zone with :  to  necessary  precision  (e.g.,  -04,
+05:30)

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