Pascha will be celebrated on the same date by all churches as will the various devotions of Holy Week this year. Orthodox, Oriental Orthodox and Eastern Rite Catholics all started Great Lent last Sunday evening at Vespers (which on church time is really the first hour of Monday). In most parts of the world this convergence of Pascha happens every five years but in some places, like Lebanon for example and I think the Holy Land and Syria, the churches have decided on a common way to determine Pascha so for example the Melkites and the Orthodox now always celebrate Pascha on the same day.
I went last night to a nearby Orthodox church (OCA) for the reading of the Great Canon, etc. and I was really disappointed because the priest reminded me of the old Latin-rite priests who used to whisper/mumble the Mass so fast you couldn't make out a word of it. The service was in English, of course, but he mumbled through it so rapidly it was unintelligible, except for one point where he got going so fast he merged a couple of lines and we heard him asking God to "make me wicked." He didn't do his prostrations but did a sort of nod to the floor (he was a youngish man, so it's not a matter of physical inability) and was so sloppy in general that I was appalled.
I hope he has other gifts that he brings to his congregation. The words are so magnificent that it is really a crime to do this service so badly.