Extra Day

Today is an extra day!  Leap year gives a wonderful opportunity to do something extra this year. Basically we will use the day to go to our Swedish Singing group!

If you have trouble deciding if it is leap year the following (might) help you:


if year modulo 4 is 0
   then
       if year modulo 100 is 0
           then
               if year modulo 400 is 0
                   then
                       is_leap_year
               else
                   not_leap_year
       else is_leap_year
else not_leap_year

OR

is_leap_year = ( year modulo 4 is 0 ) and ( ( year modulo 100 is not 0 ) or ( year modulo 400 is 0 ) )

Basically if the year divides with no remainder by 4 but not 100 except if it divides by 400 then it is a leap year.  (2000 and 2400 leap years, not 2100 or 2200).