Ehhhh…It’s pajama day, not “what you wear while sleeping” day. Pajamas are a type of clothing, ranging from little kid onesies to lounge pants/shorts and an oversized shirt.

For example, I wear pajama pants and a t-shirt in the evening, but strip down to my boxers before getting in bed. If I participated in pajama day, I’d wear the bottoms and my funniest t-shirt, not just boxers.