Maslenitsa , also known as Butter Lady, Butter Week, Crepe week, or Cheesefare Week, is an Eastern Slavic religious and folk holiday which has retained a number of elements of Slavic mythology in its ritual. It is celebrated during the last week before Great Lent; that is, the eighth week before Eastern Orthodox Pascha, equivalent to the West's Sexagesima.
The date of Maslenitsa changes every year, depending on the date of the celebration of Easter. It corresponds to the Western Christian Carnival, except that Orthodox Lent begins on a Monday instead of a Wednesday, and the Orthodox date of Easter can differ greatly from the Western Christian date.
The traditional attributes of the Maslenitsa celebration are the Maslenitsa effigy, sleigh rides, and festivities. Russians bake blini and flatbread, while Belarusians and Ukrainians cook pierogi and syrniki.