Passage: A baby in utero is seen, with the mother's voice heard soothing it. The baby recoils as if struck. Expectant mother Sarah has been in a car accident, and her husband has been killed. Months later on Christmas Eve, Sarah is making final preparations for her delivery the following day. Still reeling from her husband's death, Sarah is now moody and depressed.

Question: What holiday is Sarah making preparations on?
Christmas Eve