Grandma Marta Day (or simply Baba Marta, Bulgarian: Баба Марта, "Grandma Marta") is a holiday celebrated in Bulgaria, on March 1. Martenitsas, usually in the form of a wrist band, small yarn dolls, or tassels, are created by combining red and white colored threads and are worn on that day and throughout March. They are worn until a stork or a swallow is seen, symbolizing the coming of spring, warmer weather, and well being. Once the stork or a swallow appears the Martenitsa is taken off and hung on a blooming tree. It is common in the spring to see trees festooned in Martenitsas.