Quartodecimanism

Quartodecimanism is a denomination of those Christians that the date of Easter calculated as the Jews, the first day of Passover determined: on the 14th day of the month of Nisan ( Leviticus 23: 5 and John 19:14).This day could fall on any day of the week. The Roman Christians began the Passover on the following Sunday to celebrate.

Within early Christianity was a violent dispute with regard to calculating the date of Easter. Part of Christianity in Asia Minor , Syria and the Celtic Christianity in Ireland , Britannia and Gaul held to the old method of calculation. They were called Quartodecimanism by the Roman Christians, referring to quartus decimus, the fourteenth in Latin .

The Quartodecimanism were on the 1st Council of Nicaea ( 325 ) condemned and excommunicated, but underground raging battle continued for centuries. So too was the Synod of Whitby ( 664 ) largely devoted to this problem. Jehovah's Witnesses use the old calculation method is still today.