For the record, not even Lemaître himself who came up with the theory calls it a creation event. Guy Threepwood has been told this numerous times but still keeps repeating the same mantra. Tells us a lot about what kind of person Guy Threepwood is.Yes, I acknowledge my belief, faith as such, do you?
As far as we can tell, the universe did begin in a specific creation event.
"We may speak of this event as of a beginning. I do not say a creation. Physically it is a beginning in the sense that if something happened before, it has no observable influence on the behavior of our universe, as any feature of matter before this beginning has been completely lost by the extreme contraction at the theoretical zero. Any preexistence of the universe has a metaphysical character. Physically, everything happens as if the theoretical zero was really a beginning. The question if it was really a beginning or rather a creation, something started from nothing, is a philosophical question which cannot be settled by physical or astronomical considerations."
Library : The Faith and Reason of Father George Lemaître