What was the outcome of the First Council of Nicaea regarding the date of Easter?

The First Council of Nicaea, convened in 325 AD, sought to unify Christian practice, particularly concerning the celebration of Easter. One of the key outcomes was the establishment of a formula to calculate the date of Easter, which was a significant point of contention among early Christians. Prior to this council, various Christian communities celebrated Easter on different dates, often linked to the Jewish Passover.

The council determined that Easter should be celebrated on the first Sunday following the first full moon after the vernal equinox. This formula aimed to ensure that all Christians would celebrate Easter on a unified date, thereby fostering a sense of community and coherence within the Church.

While there were discussions about calendars and the relationship with the Jewish calendar, the primary focus was on establishing a consistent method to determine Easter's date rather than outright rejection or adoption of any specific calendar system. The decision made by the council represented an important step towards a more organized and uniform practice of Christianity that would be essential for the Church's growth and unity in subsequent centuries.