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Rails Date Formats strftime
StrFTime Format Codes for Ruby on Rails
Year
%Y year with century 2007
%y year without century 07
%C century number (year divided by 100) 20
Month
%B full month name January
%b abbreviated month name Jan
%h same as %b Jan
%m month as number (01-12)
Week
%U week number of the year, Sunday as first day of week (00-53)
%W week number of the year, Monday as first day of week (00-53)
Day
%A full weekday name Wednesday
%a abbreviated weekday name Wed
%d day of the month (01-31)
%e day of the month, single digits preceded by space ( 1-31)
%j day of the year (001-366)
%w weekday as a number, with 0 representing Sunday (0-6)
%u weekday as a number, with 1 representing Monday (1-7)
Time
%H hour (24-hour clock) (00-23)
%k hour (24-hour clock); single digits preceded by space ( 0-23)
%I hour (12-hour clock) (01-12)
%l hour (12-hour clock); single digits preceded by space ( 1-12)
%M minute (00-59)
%S seconds (00-59)
%p either AM or PM AM
%Z timezone name or abbreviation EDT
%z timezone offset from UTC -0400
Summaries
%D date, same as %m/%d/%y 05/16/07
%v date, same as %e-%b-%Y 16-May-2007
%F date, same as %Y-%m-%d 2007-05-16
%R time, 24 hour notation, same as %H:%M 18:06
%T time, 24 hour notation, same as %H:%M:%S 18:06:15
%r time, am/pm notation, same as %I:%M:%S %p 06:06:15 PM
Formatting
%n newline character
%t tab character
%% percent character
Less common formats
%s number of seconds since the Epoch, UTC
%c national date and time representation
%+ national date and time representation
%x national date representation
%X national time representation
%G year with century, starting on first Monday where week has 4 or more days.
%g year without century, starting on first Monday where week has 4 or more days.
%V week number of the year, starting on first Monday where week has 4 or more days.