twelfta dæg: twelfth day. (“twelv-tah daa”) January 6th is Twelfth Day.
Page from the calendar of the Très Riches Heures showing the household of John, Duke of Berry exchanging New Year gifts. The Duke is seated at the right, in blue. Created in France by the Limbourg Brothers between c. 1412 and 1416. [wikipedia.org]