1) July observance 
Olsok (literally `Olaf`s Wake` or `Olaf`s Vigil` - that is the eve of St. Olaf`s Day) is now the Norwegian name for 29 July, traditionally the date of the death of King Olaf II Haraldsson of Norway in the Battle of Stiklestad, east of Nidaros (Trondheim), Norway, in 1030. Olaf was canonised by Bishop Grimkell in Nidaros on 3 August 1031, an...
Olsok is a cultivated variety of potato.