Days of Horses are a multiday Rodnovery festival celebrating this animal that starts on February 13th and ends on February 17th. Like most multiday holidays and festivals in Slavic Native Faith, this one also ends with a celebration of a deity, the three-headed god Triglav.
Morana: Slavic Goddess of Death and Rebirth
Morana (Mara, Marzanna, Mora, Mare) is one of the Major Rodnovery deities. The Slavic Goddess of winter and darkness is associated with seasonal rites based on the idea of death and the rebirth of nature.
As the Goddess associated with winter’s death, rebirth, and dreams her death marks the end of Winter and the birth of Lada and Vesna, the deities of Spring.