%a    Weekday as locale’s abbreviated name.    Sun, Mon, …, Sat (en_US)
So, Mo, …, Sa (de_DE)
%A    Weekday as locale’s full name.    Sunday, Monday, …, Saturday (en_US)
Sonntag, Montag, …, Samstag (de_DE)
%w    Weekday as a decimal number, where 0 is Sunday and 6 is Saturday.    0, 1, 2, 3, 4, 5, 6
%d    Day of the month as a zero-padded decimal number.    01, 02, …, 31
%b    Month as locale’s abbreviated name.    Jan, Feb, …, Dec (en_US)
Jan, Feb, …, Dez (de_DE)
%B    Month as locale’s full name.    January, February, …, December (en_US)
Januar, Februar, …, Dezember (de_DE)
%m    Month as a zero-padded decimal number.    01, 02 … 12
%y    Year without century as a zero-padded decimal number.    01, 02, … 99
%Y    Year with century as a decimal number.    0001, 0002, … , 9999
%H    Hour (24-hour clock) as a zero-padded decimal number.    01, 02, … , 23
%I    Hour (12-hour clock) as a zero-padded decimal number.    01, 02, … , 12
%p    Locale’s equivalent of either AM or PM.    AM, PM (en_US)
am, pm (de_DE)
%M    Minute as a zero-padded decimal number.    01, 02, … , 59
%S    Second as a zero-padded decimal number.    01, 02, … , 59
%f    Microsecond as a decimal number, zero-padded on the left.    000000, 000001, …, 999999
Not applicable with time module.
%z    UTC offset in the form ±HHMM[SS] (empty string if the object is naive).    (empty), +0000, -0400, +1030
%Z    Time zone name (empty string if the object is naive).    (empty), UTC, IST, CST
%j    Day of the year as a zero-padded decimal number.    001, 002, …, 366
%U    Week number of the year (Sunday as the first day of the week) as a zero padded decimal number.
All days in a new year preceding the first Sunday are considered to be in week 0.    00, 01, …, 53
%W    Week number of the year (Monday as the first day of the week) as a decimal number.
All days in a new year preceding the first Monday are considered to be in week 0.    00, 01, …, 53
%c    Locale’s appropriate date and time representation.    Tue Aug 16 21:30:00 1988 (en_US)
Di 16 Aug 21:30:00 1988 (de_DE)
%x    Locale’s appropriate date representation.    08/16/88 (None)
08/16/1988 (en_US)
16.08.1988 (de_DE)
%X    Locale’s appropriate time representation.    21:30:00 (en_US)
21:30:00 (de_DE)
%%    A literal ‘%’ character.    %