"Jesus' baptism is commemorated in the Eastern Orthodox churches at the Feast of Theophany on January 6.
A font of holy water is typically blessed in the church, to provide holy water for the parish's use in the coming year. The next morning, after the Divine Liturgy a procession goes from the church to a nearby river, lake or other body of water, to bless that water as well. This represents the redemption of all creation as part of humanity's salvation.
In the following weeks, the priest typically visits the homes of the members of the parish and leads prayers of blessing for their families, homes (and even pets), sprinkling them with holy water. Again, this practice is meant to visibly represent God's sanctifying work in all parts of the people's lives.
Popular Epiphany customs include Epiphany singing, chalking the door, having one's house blessed, consuming Three Kings Cake, winter swimming, as well as attending church services. It is customary for Christians in many localities to remove their Christmas decorations on Epiphany Eve (Twelfth Night)."