Old style date: April 13.
This day commemorates the martyr Fomaida of Egypt, who gave her life for her faith in 476. This saint is prayed to for deliverance from lustful passion. The reason for this custom is the narrative of Fomaida's life and the miracles that occurred at her grave.
On Fomaida's day, people would go into the forest to gather medunitsa, which they used for brewing teas and making salads. Interestingly, it was believed that this fragrant flower was avoided by bees for seven versts.
According to legend, God once tasked a bee to find out which flowers produced the most honey. The bee flew over the entire earth, and liked medunitsa, wild cherry, and diatline the most. But it feared that God would take these flowers away, so it hid its opinion about them. However, God found out, became angry, and forbade the bee from collecting honey from these three honey producers. Since then, fearing punishment, the bee avoids medunitsa.
In Russia, it was customary for the most experienced housewife to go for medunitsa. And to prevent the bear, known for its disdain of the weaker sex, from recognizing her as a woman, she wore a fur coat turned inside out.
Also, on this day, the first shoots of sorrel could be picked, which were added to salads and soups. The monastery-style soup, which included sorrel, parsley, onions, potatoes, and oil, was particularly tasty in spring.

Name day on this day:
George, Dmitry, Martha