Timkat falls on the nineteenth of January by the Gregorian reckoning this rule records, the twentieth in an Ethiopian leap year, and corresponds to the eleventh of Terr on the Ethiopian calendar, a fixed offset between the two calendars. The festival is the Ethiopian Orthodox Tewahedo Church's celebration of Epiphany, commemorating the baptism of Jesus in the Jordan River, and its defining public practice is a procession in which replicas of the tabot, representing the Ark of the Covenant, are carried from individual churches to a body of water, a river, lake or purpose built pool, where they are kept overnight under guard and blessed.
The following morning's ceremony reenacts the baptism narrative directly, with the water blessed and worshippers immersing themselves or being sprinkled with it, an act understood as a renewal of baptismal vows performed once each year rather than a repetition of baptism itself, which in Orthodox theology is not repeated. The festival has been recognized by UNESCO as intangible cultural heritage and is celebrated with particular scale in the historic city of Gondar, drawing both Ethiopian Orthodox pilgrims and, in recent decades, an increasing number of outside visitors to its public processions.