strftime reference and sandbox

format dates and times in Ruby, Python, C & PHP with strftime

strftime quick reference

Dates

%a The abbreviated weekday name ("Sun")
%A The full weekday name ("Sunday")
%b The abbreviated month name ("Jan")
%B The full month name ("January")
%d Day of the month (01..31)
%e Day of the month without a leading zero (1..31)
%j Day of the year (001..366)
%m Month of the year (01..12)
%U Week number of the current year, starting with the first Sunday as the first day of the first week (00..53)
%W Week number of the current year, starting with the first Monday as the first day of the first week (00..53)
%w Day of the week (Sunday is 0, 0..6)
%x Preferred representation for the date alone, no time
%y Year without a century (00..99)
%Y Year with century

Times

%H Hour of the day, 24-hour clock (00..23)
%I Hour of the day, 12-hour clock (01..12)
%l Hour of the day, 12-hour clock without a leading zero (1..12)
%M Minute of the hour (00..59)
%P Meridian indicator ("am" or "pm")
%p Meridian indicator ("AM" or "PM")
%S Second of the minute (00..60)
%X Preferred representation for the time alone, no date
%Z Time zone name

Misc.

%c The preferred local date and time representation
%% Literal "%" character