Justice for Janitors Day
June 15, 2010
Justice for Janitors Day was established after janitors in Los Angeles were beaten by police during a peaceful demonstration against the cleaning contractor ISS, on June 15, 1990. The public outrage that generated from this incident resulted in ISS agreeing to recognize L.A. janitors in a union. In remembrance of that day, SEIU janitors and supporters take action every June 15 in cities nationwide and in countries around the world.
http://www.seiu.org/a/propertyservices/property-services-faq.php