We now enter the Christmas Season. The first 8 days of the Christmas Season is known as the Octave of Christmas it starts with Christmas and ends with the Solemnity of Mary, the Mother of God on January 1st.
The Christmas Season continues on from there ending on January 10th with the Baptism of the Lord.
The Christmas Season is rich with Feast Days and Solemnities:
In December:
25th - Solemnity of the Nativity of the Lord
26th - Feast of the Holy Family
28th - Feast of the Holy Innocents
In January:
1st - Solemnity of Mary, the Mother of God
2nd - Solemnity of the Epiphany of the Lord
3rd - The Most Holy Name of Jesus
9th - Feast of the Baptism of the Lord
Octave of Christmas:
Cooperation with God's Grace