According to the folk calendar - Mokiy Wet

On May 24 (May 11 according to the old calendar style) people celebrate Mokiy Mokry. The name of the day is borrowed from the church date of the veneration of Saint Mokios of Amphipolis, who suffered in the 3rd century for his faith in the Lord. Mokiy lived on the territory of Macedonia (modern Greece) in the city of Amphipolis, was a Christian priest and spread his faith among non-believers. For preaching Christianity, the pagans seized him and tortured him, but the priest remained unharmed. Then the ruler ordered the saint to be beheaded. Centuries later, a temple was built in honor of Mokius, where the relics of the saint were transferred. The people nicknamed the saint Wet for the frequent precipitation on a given day: fog, rain or drizzle. In addition, the name Mokiy for the Slavs was similar to the word “wet”. This day was used to determine the weather for the upcoming summer: precipitation foreshadowed a rainy summer, and a clear day, on the contrary, a dry one. If they noticed a crimson dawn, in the summer they prepared for thunderstorms and fires. On Mokiev Day they continued to celebrate the name day of Mother Raw Earth. All work in the gardens and fields was postponed until a later date. However, the day was devoted to household work: cleaning, mending, sewing. They believed that the Lord would punish people for working in the soil on this day - he would hit the planted crops with hail. It happened that thunderstorms with hail came to Mokia. To prevent it from falling out, residents read a conspiracy and burned a New Year's sheaf of straw or willow branches from Palm Sunday. In order to stop the hail that had begun, a broom was thrown into the window opening to remove the cobwebs. But the girls on Mokia Mokrogo had a ritual of getting caught in the rain so that their hair would grow beautiful. Seeing a rainbow on Mokiev day meant that the wind would soon begin. The evening fog foreshadowed stormy weather the next day. A cat sleeping with its belly up warned of the onset of heat, but a cat hiding its nose under its paw predicted a cold snap. Watching the horses shake their manes, the people prepared for the rain.