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The long-awaited common celebration of Pascha on April 15, 2001 by all Christians has come and gone.
It was in 1990 when this coincidence last occurred and will be in 2004 when it occurs again.
This assurance lasted, however, only for a short time.This resulted occasionally in local variations until, by the 6th century, a more secure mode of calculation based on astronomical data was universally accepted.This was an alternative to calculating Pascha by the Passover and consisted in the creation of so-called "paschal cycles." Each paschal cycle corresponded to a certain number of years.Most Christians eventually ceased to regulate the observance of Pascha by the Jewish Passover.Their purpose, of course, was to preserve the original practice of celebrating Pascha following the vernal equinox.