Format Characters Used by the strftime() Function for Day
Character Description
%A Full weekday name.
%a Abbreviated weekday name.
%u Weekday number (1 = Monday, 7 = Saturday).
%d Day of the month, with leading zero.
%e Day of the month, with leading space.
%j Day of the year (001–366). Note that numbering begins with 1 and not 0.