The term "gay liberation" sometimes refers to the broader movement to end social and legal oppression against LGBT people. Sometimes the term "gay liberation movement" is even used synonymously or interchangeably with the "gay rights movement". The Christopher Street Liberation Day Committee was formed in New York City to commemorate the first anniversary of the June 1969 Stonewall riots, the beginning of the international tradition of a late-June event to celebrate gay pride. The annual gay pride festivals in Berlin, Cologne, and other German cities are known as Christopher Street Days or "CSD"s.