Howdy! I've found similar solutions but not one that helps directly (and haven't been able to figure it out).
I have a SLA calculation that's basically "10 business days" and for the most part I can just use "-14d" as it's neatly going to exclude the 4 weekend days over a two week period:
project = "Site Issues" AND statusCategory != Done AND Status = Postmortem AND status changed before -14d
The problem is that tickets that are moved into that status on a Sunday or Monday, it would go OOSLA on a weekend day (Saturday and Sunday respectively) and we want it to only go OOSLA on a weekday.
Any thoughts are appreciated.