Maslenitsa is a russian national celebration, it's celebrated at pre-last week of winter.
It's about opening gates to spring, and saying "hello" to it...
We oftenly eat pancakes (bliny, as we call) during maslenitsa, it symolyse the sun, also name of celebration is based on word "Масло", it means "Butter" on russian.
Also, at last day of maslenitsa (it will be tomorrow, 18th febuary) we burn a dummy, that symbolise winter.
What is your national celebrations of your country?