Laskiaistiistai | Shrovetide
Laskiainen is a celebration with Finnish origins, which includes both pagan and ecclesiastic traditions, and is often described as a “mid-winter sliding festival”.
In clerical sense, Laskiainen is associated with Shrove Tuesday (a.k.a. Fat Tuesday) and is a celebration of the beginning of Lent that takes place before Easter. In Northern Europe, this tradition has been practiced from at least the 7th century onward, and in Catholic countries – in form of carnivals – even before that (Wikipedia).
For more information on Laskiainen, click here or watch the video below.