$CALENDAR
CAL1
  "First day of every 2 month - until the end of 2012"
  01/01/2011 03/01/2011 05/01/2011 07/01/2011 09/01/2011 11/01/2011 01/01/2012 03/01/2012
  05/01/2012 07/01/2012 09/01/2012 11/01/2012
  
CAL2
  "Last day every 3 month - until the end of 2012"
  01/31/2011 04/30/2011 07/31/2011 10/30/2011 01/31/2012 04/30/2012 07/31/2012 10/30/2012 

