The International Day Against Police Brutality occurs on March 15. It first began in 1997 as an initiative of the Montreal Collective Opposed to Police Brutality and the Black Flag group in Switzerland. The date was initially chosen for convenience (March 15 1997 fell on a Saturday), although since the year 2000, it has often been linked to an alleged incident in which two children, aged 11 and 12, were beaten to death by the Swiss police.^{[citation needed]}

Acceptance of March 15 as a focal day of solidarity against police brutality varies from one place to another. In the United States, the October 22 Coalition to Stop Police Brutality, Repression, and the Criminalization of a Generation, a group mounted by the RCP, has succeeded in building support for October 22 (also known as O22) as National Anti Police Brutality Day since 1995.

Maybe they can use this for their t-shirts: