Noun
midnight mass (countable and uncountable, plural midnight masses)
A mass held at midnight.
(in particular) A Roman Catholic religious service that marks the beginning of Christmas Day.
At Midnight Mass the hushed, surprised congregation heard the lovely carol accompanied by a guitar. Source: Internet
Back when I was Archbishop of Milwaukee, after Midnight Mass at the Cathedral, we were closing up. Source: Internet
Some days later I was observing family members entering Queen’s House Retreat Chapel for our Midnight Mass New Year’s gathering. Source: Internet
However, under Level 3, Mass and other religious services should still be livestreamed-- meaning it's possible Christmas Day and Midnight Mass may not take place this year. Source: Internet