Which carol ends with'and Christmas comes once more'?

Answer 1

The fourth stanza of `O Little Town of Bethlehem' goes:

Where children pure and happy pray to the blessèd Child,

Where misery cries out to Thee, Son of the mother mild;

Where charity stands watching and faith holds wide the door,

The dark night wakes, the glory breaks, and Christmas comes once more.

There is, however, a fifth stanza, so that's not really the *absolute* end of the carol.

Answer 2

The carol that ends with the lyric "and Christmas comes once more" is "Deck the Halls."