It's said to drive out the winter and herald the start of Lent - the traditional 'Butter Week' or 'Maslenitsa'.
In this video visit one especially cheerful Maslenitsa festival in a sculpture park two hundred kilometres from Moscow.
The festival has Eastern Slavic roots and takes place the last week before Lent, namely the eighth week before Easter.
After watching you might end up with a craving for pancakes though.
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