I've worked in offices before (engineering, architectural) that have one day a week where they don't answer the phone except for emergencies, and lets say frida

I've worked in offices before (engineering, architectural) that have one day a week where they don't answer the phone except for emergencies, and lets say friday is 'catch up and do paperwork day'. Externally it might seem like 4 days a week, but its actually 5 with one where you can't reach them.