Epiphany or Three Kings' Day (Western Christianity) or Theophany (Eastern Christianity), and its related observances: Þrettándinn (Iceland)

Christmas in Iceland (Jól) starts four weeks before proper Christmas, which begins on 24 December (Aðfangadagur) and ends thirteen days later on 6 January.

Iceland is a Nordic island country between the Arctic Ocean and the North Atlantic Ocean, located on the Mid-Atlantic Ridge between Europe and North America. It is culturally and politically linked with Europe and is the region's westernmost and most sparsely populated country. Its capital and largest city is Reykjavík, which is home to about 36% of the country's roughly 390,000 residents. The official language of the country is Icelandic. Iceland is on a rift between tectonic plates, and its geologic activity includes geysers and frequent volcanic eruptions. The interior consists of a volcanic plateau with sand and lava fields, mountains and glaciers, and many glacial rivers flow to the sea through the lowlands. Iceland is warmed by the Gulf Stream and has a temperate climate, despite being at a latitude just south of the Arctic Circle. Its latitude and marine influence keep summers chilly, and most of its islands have a polar climate.

January 6 is the sixth day of the year in the Gregorian calendar; 359 days remain until the end of the year.