Lotus/Microsoft date to julian date

   Base date used by Lotus/Microsoft is 1/1/1900, but an extra day is
  tossed in between then and now because both incorrectly assume 
   that 2/29/1900 is a valid date (1900 is not a leap year). Microsoft 
   still does this for backwards compatibility. Thus the correct 
   adjustment to go from a Lotus/Microsoft date number to a julian date
   number is to add julian(1/1/1900) - 2 = 2415021 - 2 = 2415019.

julian = (int) (lotusdate+ 2415019);