Concurrent (Easter)
A concurrent was the weekday of 24 March in the Julian calendar counted from, regarding as Sunday. It was used to calculate the Julian Easter during the Middle Ages. It was derived from the weekday of the first day of the Alexandrian calendar during the 4th century, , counting Wednesday as . Therefore the following was a Sunday and the following was also a Sunday. It was first mentioned by Dionysius Exiguus in 525 in his Latin version of the original Alexandrian Church's Greek computus. The insertion of the sixth epagomenal day immediately before was compensated for by the bissextile day inserted six months later into the Julian calendar.
The widely used post-Bedan solar cycle, which repeats every 28years, had concurrents of
It skips a concurrent every four years due to a bissextile day in the Julian calendar a month earlier. The Sunday after the next was Easter Sunday. The concurrent is not used by the Gregorian Easter.
