The European Foundation for Slavic Literature and Culture and the Foundation of Ukrainian Literature and Culture congratulate everyone on the feast of the Apostles Peter and Paul. Day of Peter and Paul, the full name is the Day of the holy, glorious and supreme apostles Peter and Paul.The memory of the saints is revered throughout the Orthodox world, since the apostles are the most significant followers of Jesus Christ. They both preached Christianity and brought tens of thousands of people to the faith.
On this day, believers go to church for a festive service, pray for health, protection and healing.
Source: https://en.wikipedia.org/wiki/%D0%94%D0%B5%D0%BD%D1%8C_%D0%9F%D0%B5%D1%82%D1%80%D0%B0_ %D0%B8_%D0%9F%D0%B0%D0%B2%D0%BB%D0%B0