#    Code      Example    Description
#    %a      Sun        Weekday as locale’s abbreviated name.
#    %A      Sunday        Weekday as locale’s full name.
#    %w    0            Weekday as a decimal number, where 0 is Sunday and 6 is Saturday.
#    %d      08            Day of the month as a zero-padded decimal number.
#    %-d   8            Day of the month as a decimal number. (Platform specific)
#    %b      Sep        Month as locale’s abbreviated name.
#    %B      September    Month as locale’s full name.
#    %m      09            Month as a zero-padded decimal number.
#    %-m      9            Month as a decimal number. (Platform specific)
#    %y      13            Year without century as a zero-padded decimal number.
#    %Y      2013        Year with century as a decimal number.
#    %H      07            Hour (24-hour clock) as a zero-padded decimal number.
#    %-H       7            Hour (24-hour clock) as a decimal number. (Platform specific)
#    %I      07            Hour (12-hour clock) as a zero-padded decimal number.
#    %-I      7            Hour (12-hour clock) as a decimal number. (Platform specific)
#    %p      AM            Locale’s equivalent of either AM or PM.
#    %M      06            Minute as a zero-padded decimal number.
#    %-M      6           Minute as a decimal number. (Platform specific)
#    %S      05            Second as a zero-padded decimal number.
#    %-S      5            Second as a decimal number. (Platform specific)
#    %f      000000        Microsecond as a decimal number, zero-padded on the left.
#    %z      +0000        UTC offset in the form ±HHMM[SS[.ffffff]] (empty string if the object is naive).
#    %Z      UTC        Time zone name (empty string if the object is naive).
#    %j      251        Day of the year as a zero-padded decimal number.
#    %-j      251        Day of the year as a decimal number. (Platform specific)
#    %U      36            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.
#    %W      35            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.
#    %c      Sun Sep 8 07:06:05 2013     Locale’s appropriate date and time representation.
#    %x      09/08/13    Locale’s appropriate date representation.
#    %X      07:06:05    Locale’s appropriate time representation.
#    %%      %            A literal '%' character.