The Julekalender (The Christmas Calendar) is a "julekalender" that originally aired in Christmas 1991. (a Norwegian version was made in 1994, and a Finnish version appeared in 1997). It was written and performed almost entirely by a trio of Danish comedy musicians called De Nattergale with financial and technical assistance from TV2, a Danish television company. It was hugely successful at the time, causing many invented phrases from the series to enter popular culture and was later released on VHS and subsequently DVD.