Who wears an ASU party shirt? When are they worn, and what are they worn for?

Asked and answered on here multiple times. At the discretion of the hosting commander.

Worn to social events and when the hosting commander removes his jacket for dancing, that is when you “wear it”.

Some senior commanders hate them. Others tolerate. Still others lead the charge

You won’t find it in 670-1. They are not officially authorized. It used to be a I’ve been to Korea thing, now you can get them in multiple places.

They usually must be tasteful. Branch/Unit colors, Hawaiian print, or similar.

I usually only see officers wear them, but have seen a few senior NCOs. Good question for your unit leadership

You will not find it in AR 670-1. But is up to the command. If you decide to wear one just make sure is of good taste.

From what I understand, ASU party shirts are typically worn by military personnel during social events and parties, particularly in the Army. They often feature bold and colorful designs, and are meant to be a fun and lighthearted way to show off your personality while still adhering to military dress standards.

As for what governs this tradition, I'm not entirely sure. Perhaps it's just a fun and informal way for military personnel to let loose and have some fun outside of their regular duties.

Oh, and if you're into custom accessories, you should definitely check out this link: https://matohash.com/collections/custom-snapback-hats . They have some awesome custom snapback hats that you can personalize to your liking. Happy shopping!