Date in the old style: May 2. The commemoration day of the martyr princes Boris and Gleb is the first Orthodox holiday established in Russia. Its history began in 1115. Boris and Gleb (baptized as Roman and David) were Russian princes, sons of Kiev Prince Vladimir Sviatoslavovich. In the internal struggle that erupted in 1015, they were killed by their older brother, Sviatopolk the Accursed. Boris and Gleb became the first Russian saints. Subsequently, they began to be considered protectors of the Russian land. In Russia, from this day, people started planting cucumbers and pumpkins. To make them grow large, a pestle from a mortar was buried in the garden. Also, on this day, fields continued to be sown. It was said: "Boris and Gleb sow bread." From Boris and Gleb's day, nightingales begin to sing. If they sing loudly and solidly, it means summer is not far away. If the nightingale sings all night, the next day will be sunny. And if you hear the nightingale before the cuckoo, you will live happily all summer. It was also said that if you take off your shirt at the first nightingale's trill, fleas will not bite you. Sometimes this day was also called "profit day," and Saint Boris was called the profit-maker. Merchants celebrated his memory vigorously, hoping to receive profits throughout the year. A successful year was also foretold by a successful sale on this day. Names celebrated on this day: Athanasius, Boris, Gleb, David, Zoe, Roman.