Þorrablót (Icelandic pronunciation: [ˈθɔrːaplout]) is an Icelandic midwinter festival, named for the month of Þorri of the historical Icelandic calendar (corresponding to mid January to mid February).
The historical context is from the Orkneyinga saga, where Þorri ("Frost") is an early Norwegian king, the son of Snær ("Snow"). Hversu Noregr byggðist ("How Norway was settled", 12th century) states that the Kvens offered a yearly sacrifice to Þorri at mid-winter.
The modern festival arose in the second half of the 19th century, with the Romantic nationalism of the time, comparable to Burns night in Scotland. The first known celebration was reportedly organised by the association of Icelandic students in Copenhagen in 1873, and by other societies active in the Icelandic independence movement of the time (Iceland received a constitution in 1874, and was recognized as a kingdom in personal union with Denmark in 1918).
The Þorrablót is an evening with dinner where participants hold speeches and recite poems, originally to honour the Norse god Thor (Þórr), whose name is taken to be associated with Þorri. Calling the feast a blót (a feast held in honor of a god in Norse paganism) makes clear the reference to pagan times, which many nationalists of the 19th century considered a golden age of Icelandic history.