Hi @hmoldovan !
From what I understand, you’re looking to know what the 5th business day of the following month, right?
I don’t think it’s possible to do direct in DS eSignature, as it would require an external database for queries (which Docusign does not currently offer). If you do this via API, having an external system to Get the information and later correct it, this would be possible - but it requires development on your part.
In any case, I will share below all the commands related to Dates that can be used in formula field. I hope it helps you!
Calculating Days and Dates
Let me know if you need more help!