Does anyone have an elegant and efficient calculation for getting the number of days between two days EXCLUDING weekends? I have an old calculation that I used way back in the FM3-FM6 era, but I imagine there is a much better, efficient calculation out there.

You could do

weekofyear(enddate)-weekofyear(startdate)

and subtract 2 days for each week if the number of days ≥ 7

http://www.briandunning.com/cf/185

Hello

Is there a topic, or any reference here about date filters and agorithms?

The question above (excluding weekends) is related with date samplers. As far as I know, date filters or algorithms are typically used for obtaining the required time series variations in fee and commission calculations like:

• month-end data
  
• quarterly month-end averages
  
• monthly data with maximum value of the month
  
• quarter-end data with search-backwards method if the last day of quarter is not available
  

I have no idea how one could implement date filters and algorithms with filemaker. Anyway, I am planning to write an article about the mathematics of this issue. Any comments or quations are very much appreciated, so that I can consider them in my article.

See:

http://finaquant.com/forum/general-framework-concepts/article-about-date-filters-or-algorithms-for-fee-and-commission-calculations

Regards

Tunc