The Day of the Baptism of Rus’ is observed in Ukraine on July 15 and in Russia on July 28, commemorating the baptism of Grand Prince Volodymyr the Great and the beginning of the Christianization of Kyivan Rus’. This annual observance highlights the significance of Volodymyr's conversion to Eastern Christianity in 988, which is seen as a pivotal moment for Ukrainian statehood. In Ukraine, the holiday was officially established in 2008 by President Viktor Yushchenko and was celebrated on July 28 until 2023, when the Orthodox Church of Ukraine switched to the Revised Julian calendar. The day coincides with Ukrainian Statehood Day, a public holiday instituted by President Volodymyr Zelenskyy in 2022. In Russia, the holiday was established in 2010 to honor its historical importance for Russian statehood and is celebrated annually on July 28. The observance typically includes religious ceremonies and commemorative events in churches, reflecting on the cultural and spiritual development of the region.