var BANK_HOLIDAYS = {
  "2009-4" : [10, 11,13,14],
  "2009-5" : [4,5, 25,26],
  "2009-8" : [31],
  "2009-9" : [1],
  "2009-10" : [1,2,3,4,5,6,7],
  "2009-12" : [23,24,25,26,27,28,29,31],
  "2010-1" : [1,2,3,4]
};