Do you know, by chance, the name of this uniform? The Greek guards have some interesting uniforms, but so far I was not able to get an overview...
This is also an untypical one... not many countries have the pride to show their beautiful folk costumes in a military parade:
I found some information online about the white uniforms
It's called Foustanella or Greek Kilt, made from 400 pleats,representing the years of Ottoman occupation . https://whyathens.com/evzones-uniform-greek-soldier/