Which opera was written earlier, Punch and Judy or Einstein on the Beach?
Punch and Judy (opera): Punch and Judy is an opera with music by Harrison Birtwistle and a libretto by Stephen Pruslin, based on the puppet figures of the same names. Punch and Judy (opera):  The opera was first performed at the Aldeburgh Festival, which had commissioned the work, on 8 June 1968, with David Atherton conducting the English Opera Group.
i don't know