I started my countdown on a Tuesday and was gone that same-week's Friday morning. Told elsewhere, I learned of a new assignment which I didn't want. I gave my notice on a Tuesday and had my exit interview 3 days later. I was still actually officially empl*yed - and would have returned for a dire emergency - for about 3 more weeks. I took all of it as vacation time. I stayed up until midnight on the very last day and listened to my company voicemail account go "dark." Quite a pleasing end to my tenure. YMMV
Ko'olau's Law -
Anything which can be used can be misused. Anything which can be misused will be.