I read in a catechism:
“The Church commands us to keep the Sunday holy instead of the Sabbath because on Sunday Christ rose from the dead, and on Sunday he sent the Holy Ghost upon the Apostles.”
How is that possible? Pentecost means “fifty”, referring to the fiftieth day after the Passover. Our Pentecost is on a Sunday because our Easter is on Sunday. That is because the Church ruled that Easter should be the Sunday after the Passover would have been celebrated that year in the Old Law.
But we know from the Gospels that Christ was most certainly not crucified on a Sunday, since he rose on the third day, which was a Sunday. So wouldn’t the Pentecost that year have to have been late in the week?