/*a list of all days where there is no yoga session on (for special celebrations, e.g.) */

  var NO_YOGA_DAYS = {
    1 : [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16, 17 ],	// in January
    2 : [ 6 ],	// in February
    3 : [  ],	// in March
    4 : [ 2,3,4,5,25 ],	// in April
    5 : [  ],	// in May
    6 : [ 7 ],	// in June
    7 : [ ],	// in July
    8 : [  ],	// in August
    9 : [  ],		//  in September
    10: [ 25 ],	// in October
    11: [  ],	// in November
    12: [ 25, 26, 27, 28, 29, 30, 31 ]	// in December
  };