Early in the summer when recent high school graduates infest the beaches of the Northeast by getting drunk and stupid, usually by consuming cheap or low-alcohol beverages, such as Zima.
It's June and a kid is pissing on himself in the beach parking lot at 4 PM. It must be Zenior Week.
Pajama casual is a term used when working from home and preparing for a video conference. All business above the waist and your pajama pants down below.