AKA 40 Days After Christmas = The Presentation of the Lord - February 2
We celebrate Christmas until January 10 - The Baptism of the Lord!
But wait, there's more!
February 2 - The Feast of the Presentation of the Lord
The Church circles back around to the Christmas season forty days after Christmas, on the Feast of the Presentation of the Lord. The Law of Moses required first-born sons to be dedicated to the Lord, so Mary and Joseph dutifully brought the baby Jesus to the Temple for his dedication and circumcision (Luke 2:22-38). In some countries (and some households), it is traditional to keep Christmas decorations up until this feast.
This feast is also traditionally known as Candlemas; centuries ago, the feast was accompanied by a candlelight procession and a blessing of beeswax candles from the home.
Family - The Domestic Church
The home is the first school of Christian life and 'a school for human enrichment.' Here one learns endurance and the joy of work, fraternal love, generous — even repeated — forgiveness, and above all divine worship in prayer and the offering of one’s life.
-Catechism of the Catholic Church, #1657