Granny March is a mythical figure in Bulgarian folklore who marks the end of winter and the beginning of spring. On March 1st, Bulgarians celebrate Granny March's day by exchanging martenitsas, which are red and white bracelets. The white color symbolizes light and purity while red symbolizes health, conception, and birth. According to legend, the first martenitsa was created by Achinora, the wife of Khan Asparuh in the 7th century, when she tied a message of health and love to a bird but its legs bled onto the white thread, turning it red.