Femtende mars:
International:
Upholding law and order were important, but this practice shouldn't include violence. Especially not intended violence.
Police brutality was more often, than not aimed at non-white people. And by that is meant 51% of all police brutality. The worst thing about police brutality, aside from it being violence against people, was that it was almost impossible to stop it because they were protected by the law and could justify their actions, no matter how brutal.
For this reason, an many unnamed others, the initiative of the Black Flag group in Switzerland and the Montreal-based Collective Opposed to Police Brutality got the International Day Against Police Brutality started. And every year, in Montreal, on this date, they would have a march to promote this cause, which had only twice avoided hassling by the police, effectively proving their point.
Author's notes:
I don't own Hetalia