Easter Vigil.
My parish had a candlelight segment during the Christmas Eve (7:00 p.m.) Mass in the main sanctuary, but not in the “overflow” Mass in the hall, which I attended. Father said the Fire Marshal turned up at an earlier Mass and threatened to clear the building because of the crowds, so they couldn’t have candles at all!
I found this:
“Christmas Eve...11:30 PM: Concert of traditional German and English Christmas carols....Midnight: Traditional Latin High Mass; begins with candlelight
procession in which the celebrant lays the Infant Jesus in the crèche.” http://www.latinmassnetwork.net/2007/12/holy-trinity-boston-ma-christm.html