Martenitsi are traditional Bulgarian ornaments made from red and white yarn. They are typically worn or given as gifts during the month of March to celebrate the arrival of spring. The red symbolizes health and vitality, while the white represents purity and happiness. On March 1st, people exchange martenitsi as a way to wish each other good health and prosperity. It is customary to wear them until the first signs of spring appear, such as the blooming of trees or the sighting of storks. Once these signs are observed, the martenitsi are often tied to a tree or placed under a rock.