Which opera was written earlier, Punch and Judy or Einstein on the Beach?
Punch and Judy (opera):  Birtwistle wrote the score from 1966 to 1967. Einstein on the Beach:  The music was written "in the spring, summer and fall of 1975." Einstein on the Beach:  The premiere took place on July 25, 1976, at the Avignon Festival in France.
i don't know