Wow, m8, u blew my mind... Thanks a lot! This was my very first experience with an UBF function. I had to read additional info on the web in order to get how it works. =) I really appreciate your help.

Well, I managed to start this UBF. It does count the number of days correctly, but for some reason it fails 183 days check. I used it on one example and it told me that the company exceeded 183 days threshold even though the total number of days was less than 183 =(

Could you correct it for me please? Thank you in advance.

Cheers,m8.