Date:
%M - Month (1-12), no leading 0.
%MM - Month (1-12), with leading 0.
%MMM - Month, abbreviated text ("Jan").
%MMMM - Month, full text ("January").
%d - Day (1-31), no leading 0.
%D - Day (1-31), with leading 0.
%y - Year, two digits ("21").
%Y - Year, full representation ("2021").
%w - Weekday, abbreviated ("Fri").
%W - Weekday, full representation ("Friday").
Time:
%h - Hour, 24-hour format.
%hh - Hour, 12-hour format, no leading 0.
%hhh - Hour, 12-hour format, with leading 0.
%m - Minutes.
%s - Seconds.
%a - AM/PM indicator.