The cap and gown is a formal dress to show achievement.
Earning the Eagle, Globe, and Anchor is on a much higher level of achievement.
As a Marine, I say let them wear the Blues.
Beat me to it.
I disagree.
The “uniform of the day” is cap and gown. There is no requirement or prohibition for what is worn underneath. Unless USMC regulations prohibit wearing blues under the gons, with the cap replacing the normal uniform headgear due to its being covered, the school is correct.
I’m a former Army O-3.