According to the folk calendar - Fedul Vetrenik

On April 18 (April 5, old style) Fedul Vetrenik is celebrated in the folk calendar The day is named in honor of the righteous martyr Theodulus of Thessalonica, a church reader from Thessalonica, revered on this date among Orthodox believers Theodulus lived in Greece in the 3rd and 4th centuries and served as a reader in the church When the pagan persecution of Christians began, Theodulus and his colleague Deacon Agathopoda were brought to trial before the head of the city They tried to persuade them to idolatry, first with convictions, then with lies, but the Christians firmly refused They were sent to prison, but after a while they were interrogated again For refusing to renounce Christianity, Theodulus and Agathopod were thrown tied into the sea, where they died The winds became warm among the people from Fedula Vetrenik, which is why the day was called that The night frosts had already passed; during the day it was so warm that the peasants took off their casings and sheepskin coats Along with the warmth, insects appeared in the gardens The crickets were entering their mating season and their chirping was often heard On the day of Fedul Vetrenik there was a custom to ventilate the room After a long winter, this was useful, and the air outside was warm and did not freeze the rooms Residents opened the windows and read a special spell so that evil spirits, illnesses or commotion would not enter their homes People believed that commotion could enter a household and bring him illness or problems To get rid of it, the patient was taken to a healer for healing According to the signs of Fedul Vetrenik, they were guided by the future weather The silence in the area foreshadowed a change in weather and windiness A cold night after a warm day meant that the days would continue to be fine If a capercaillie current was heard, they prepared for sunny days, and their silence, on the contrary, promised coolness The remains of snow in deep ditches determined when it was time to sow the fields: a snowdrift the height of a cow was considered a good sign