%a – abbreviated weekday name   %A – full weekday name   %b – abbreviated month name   %B – full month name   %d – day of the month (01 to 31)

  %D* – same as %m/%d/%y

  %e* – day of the month (1 to 31)   %H – hour using a 24-hour clock (range 00 to 23)   %I – hour using a 12-hour clock (range 01 to 12)   %m – month as a number (01 to 12)   %M – minute as a number   %p – either “am” or “pm” according to the given time

  %R* – time in 24 hour notation

  %S – second as a decimal number

  %T* – current time, equal to %H:%M:%S

  %y – 2 digit year (00 to 99)   %Y – 4 digit year   %Z – time zone or name or abbreviation   %% – a literal ‘%’ character

* Does not work on Windows-based servers.