The formatting codes for strftime are listed below:

Code	Replacement string
%a	Abbreviated weekday name in the locale
%A	Full weekday name in the locale
%b	Abbreviated month name in the locale
%B	Full month name in the locale
%c	Date and time representation appropriate for locale
%C	The year divided by 100 and truncated to an integer, as a decimal number (00−99)
%d	Day of month as a decimal number (01 - 31)
%D	Equivalent to %m%d%y
%e	Day of month as a decimal number (1 - 31), where single digits are preceded by a space
%F	Equivalent to %Y-%m-%d
%g	The last 2 digits of the ISO 8601 week-based year as a decimal number (00 - 99)
%G	The ISO 8601 week-based year as a decimal number
%h	Abbreviated month name (equivalent to %b)
%H	Hour in 24-hour format (00 - 23)
%I	Hour in 12-hour format (01 - 12)
%j	Day of the year as a decimal number (001 - 366)
%m	Month as a decimal number (01 - 12)
%M	Minute as a decimal number (00 - 59)
%n	A newline character (\n)
%p	The locale's AM / PM indicator for 12-hour clock
%r	The locale's 12-hour clock time
%R	Equivalent to %H:%M
%S	Second as a decimal number (00 - 59)
%t	A horizontal tab character (\t)
%T	Equivalent to %H:%M:%S, the ISO 8601 time format
%u	ISO 8601 weekday as a decimal number (1 - 7; Monday is 1)
%U	Week number of the year as a decimal number (00 - 53), where the first Sunday is the first day of week 1
%V	ISO 8601 week number as a decimal number (00 - 53)
%w	Weekday as a decimal number (0 - 6; Sunday is 0)
%W	Week number of the year as a decimal number (00 - 53), where the first Monday is the first day of week 1
%x	Date representation for the locale
%X	Time representation for the locale
%y	Year without century, as decimal number (00 - 99)
%Y	Year with century, as decimal number
%z	The offset from UTC in ISO 8601 format; no characters if time zone is unknown
%Z	Either the locale's time-zone name or time zone abbreviation, depending on registry settings; no characters if time zone is unknown
%%	Percent sign