Format Characters for strftime

Introduction

FORMAT SPECIFIER	DESCRIPTION
%a	Day of the week, abbreviated.
%A	Day of the week, spelled out.
%b	Month name, abbreviated.
%B	Month name, spelled out.
%c	Complete month and day.
%D	Day of the month, 01 to 31.
%H	Hour, 00 to 23 (based on 24-hour clock).
%I	Hour, 00 to 11 (based on 12-hour clock).
%J	Day of the year, 000 to 366.
%m	Month, 01 to 12.
%M	Minute, 00 to 59
%p	a.m./p.m. designation.
%S	Seconds, 00 to 61 (up to two leap seconds)
%U	Week number, 01 to 53. Week 1 starts with first Sunday.
%w	Weekday, 0 to 6, in which Sunday is 0.
%W	Week number, 01 to 53. Week 1 starts with first Monday.
%x	Date.
%X	Time.
%y	Year, 00 to 09, within the century.
%Y	Year.
%Z	Time zone; blank if time zone is not known.
%%	Literal %.