Situation, in der er lebt» (It's not the Homosexual who is perverse, but the situation in which he lives) at the universities of Zürich, Basel and Bern. Following the screenings, the LGBT groups in Zürich (HAZ), Basel (initially called HAB, then HABS) and Bern (HAB) were established. Politically, the HA groups were close to the Marxist–Leninist PO-groups. In 1973 in Zürich, men in the leather subculture joined together to form the group Loge70. In 1974, the HA groups founded their first national governing body, the Homosexuellen Arbeitsgruppen Schweiz (HACH) (Homosexual Working Groups of Switzerland). There were a variety of groups and offerings on the commercial scene. The social climate changed significantly in favour of LGBT people. Large employers made rules stating that employees can no longer be dismissed because of their homosexuality. However, the police still maintained their register of LGBT people. In 1975, gays marched with a banner on the 1 May (May Day) rally in Basel, the first time LGBT people had drawn attention to their concerns to the wider public. Part of the political left was very irritated by the participation of homosexuals. 24 June 1978: The first Christopher Street Day (CSD) in Switzerland The ‘Homosexuellen Arbeitsgruppen Schweiz’’ (HACH) (‘’Gay Working Groups of Switzerland’’), the ‘’Schweizer Organisation der Homophilen’’ (SOH) (Swiss Organization of Homophiles) and the ‘’Homosexuelle Frauengruppe’’ (HFG) (Gay Women's Group) organized the first ‘’Christopher-Street-Liberation-Memorial Day’’ (CSD) in Switzerland at the Zürich Platzspitz to commemorate the Stonewall riots. Christopher Street Day is the name for LGBT Pride parades in Germany and Switzerland (they are called Rainbow Parades in Austria). It started by collecting 5,500 signatures to call for the total abolition of the police register of homosexuals. This was accompanied by calls for the abolition of the register in the press, which together forced the destruction of the files. From 1979 to 1982, annual national CSD LGBT pride rallies were organised. They were marked by a massive police presence due to fears of possible riots caused by the youth unrest at the time, but there was no rioting. In 1979, the ‘’Nationale Schwulendemo’’ (‘’National Gay Demo’’) was held in Bern. In 1980, Basel held ‘’Gay 80’’, followed by CSDs in Lausanne (1981) and Zurich (1982). For the time, the demonstrators used radical, almost revolutionary slogans. In addition to specific demands such as lifting the gay registry and the elimination of discrimination in the criminal justice system,