In Paris, concerts start no later than 6.30main
Radio France has published a list of forthcoming concerts which start anywhere between 2.30 pm and 6.30 to meet the curfew hour of 9pm.
The Théâtre des Champs-Elysées starts at 6 or 6.30. The Philharmonie de Paris has moved to 6.30.
And no going out to dinner afterwards.