What significant Christian observance is closely timed with the prominent visibility of Orion's Belt in the Northern Hemisphere winter sky?

Answer

Epiphany

The association of the belt with the Magi centers around the timing of the Epiphany, which commemorates their visit and falls on January 6th, when Orion is highly visible.

What significant Christian observance is closely timed with the prominent visibility of Orion's Belt in the Northern Hemisphere winter sky?
KingstarconstellationbeltOrion