Twelfth Night or
Epiphany Eve, when the three wise men are added to manger scenes. a festival which takes place on the last night of the Twelve Days of Christmas, marking the coming of the Epiphany.
Different traditions mark the date of Twelfth Night as either 5 January or 6 January, depending on whether the counting begins on Christmas or 26 December, according to wikipedia.
Twelth Night traditions include eating King cake, singing Christmas carols, chalking the door, having one’s house blessed, merrymaking, attending church services, and preparing to take down Christmas decorations.
According to Why Christmas, “Twelfth Night was a big time of celebration with people holding large parties. During these parties, often the roles in society were reversed with the servants being served by the rich people. This dated back to medieval and Tudor times when Twelfth Night marked the end of ‘winter’ which had started on 31st October with All Hallows Eve (Halloween).”