%a - Abbreviated day of the week.

%A - Full day of the week.

%b - Abbreviated month name.

%B - Full month name."

%d - Day of the month [01,31]."

%j - Day of the year [001,366]."

%H - Hour (24-hour clock) [00,23]."

%I - Hour (12-hour clock) [01,12]."

%M - Minute [00,59]."

%p - Equivalent of either AM or PM."

%S - Seconds [00,61]."

%w - Day of the week number [0(Sunday),6]."

%y - Year without century [00,99]."

%Y - Year with century."

%m - Month number [01,12]."

1. %b, %B ==> Dec, December

2. %a ,%A ==> Fri, Friday

3. %y, %Y ==> 08, 2008

4. %d, %m ==> 05, 12

5. %H:%M:%S ==> 18:25:20

6. %I:%M:%S %p ==> 06:25:20 PM

7. %j ==> 340

8. %S ==> 20

9. %w ==> 5 ( Friday is the 6th day)