by John Fotopoulos,
There is a common misperception among Orthodox Christians that the
reason why Orthodox Easter (i.e. Pascha) often occurs so much later than
Western Christian Easter is because the Orthodox Church abides by the
rules for calculating the date of Pascha issued by the 1st
Ecumenical Council at Nicaea in 325 AD and thus the Orthodox must wait
for Passover to be celebrated by the Jewish community before Pascha can
occur.