I think we misunderstand each other a little bit. I think we should forget about the time exceptions for a while. I understand now that it is not the solution to this problem.
What I want to do is to schedule a job for the third workday every month over the next couple of years.
Bank holidays is creating a problem for me.
For example the 1st of may is not a workday but Visualcron consider it to be, when it happens mon-fri.
This year, since the 1st of may is on a monday, the 3rd workday of may is actually the 4th of may in the calendar.
Visualcron, on the other hand consider the 3rd of may to be the 3rd workday of the month. That is my problem.
This is just one example of many of my scheduled jobs that is dependent of "work days".
I can possibly solve this another way but I think it would be a useful feature to be able to set bank holidays as not beeing workdays.