Immediately after the Second World War, May 1 celebrations came back to life: Ernst Nobs, the first cabinet minister from the left-wing Social Democratic Party, gives a speech outside parliament in Bern on May 1, 1946. (Photos Keystone).
Keystone / Str
Workers demonstrate in Zurich in 1949.
Keystone / Str
May 1 in Zurich, 1967: In the 1960s, issues and demands included the countries of origin of migrant workers.
Keystone / Str
In the 1960s processions were joined by migrant workers and students with their demands. The image shows May 1, 1968, in Zurich.
Keystone / Str
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