In work this week I came across a couple of problems in which I needed to performs some calculations involving dates and a number of “work days” rather than just normal numbers of days. My first few attempts filed miserably, so I did some Googling to see if I could find anyone else that had come across the same problem and of course, there were plenty of people.

The code I eventually used I found shoehorned into the middle of a coding help forum and, with a little bit of tweaking, it calculated the number of whole work days in between two dates. The code is as follows:

This code solved my first problem, however I couldn’t find any code to solve my second problem, how to calculate a final date from a start date and a specified number of work days, to do the calculation I came up with the following code:

Hope this code works as well for you as it did for me.

Check back soon.

**Update:** Improved the calculating code with the suggestion from Anass (below) and made some more accuracy & business logic improvements to the ‘calculateDuration’ method. Enjoy.