What is quel jour est-ce?
Quel jour est-ce means 'What day is it ?'
"What day are we going to hold an evening party, my love?" is an English equivalent of the French phrase Quel jour on va faire une bonne soirée, mon amour? The question translates literally as "What day one is going to do (host, make) one good evening (event), my love?" in English. The pronunciation will be "kel zhoor o va feh-ryoon buhn swa-rey mo-na-moor" in French.