From Wkipedia
"Little Christmas, or Nollaig Bheag in Irish, is one of the traditional names in Ireland for January 6, more commonly known in the rest of the world as the Epiphany. It is so called because it was the day on which Christmas Day was celebrated under the Roman calendar, before the adoption of the Gregorian calendar. It is the traditional end of the Christmas season and the last day of the Christmas holidays for both primary and secondary schools in Ireland."
Notice it doesn't say anything about turkey and prezzies, though...