Problem Statement

Write a program or a script that returns the last Sundays of each month of a given year. The year may be given through any simple input method in your language (command line, std in, etc). Example of an expected output:

Let's start with the solution:

import: date

: lastSunday(y)
| m |
   Date.JANUARY Date.DECEMBER for: m [
      Date newDate(y, m, Date.DaysInMonth(y, m))
      while(dup dayOfWeek Date.SUNDAY <>) [ addDays(-1) ] println
      ] ;