Computus

Computus is the method used to determine the date of Easter each year in the Christian calendar. Since Easter is linked to the lunar cycle, computus involves calculating the position of the moon and the vernal equinox to find the first Sunday after the first full moon following the equinox. Over centuries, mathematicians developed algorithms and tables to standardize this calculation, ensuring that Easter is celebrated consistently across Christian communities. Essentially, computus blends astronomy, mathematics, and tradition to pinpoint an annual date that aligns with religious and historical significance.