Pardon my confusion... Since the article about "March 25th" was posted on the Western March 25th, I was discounting the calendar shift.
Also, the Eastern religionists I presently work with are Armenian, furthering my confusion. (I should know better... My confirmation sponsor was Byzantine!)
The last time that Annunciation and Pascha coincided (for those following the Julian calendar) was 1991. The next time it will coincide will be 2075 -- I don't think I'll be around for that one!
The last time that Great Friday and Annunciation coincided was in 1961, and the next time will be 2045. I'll be an old man, but that one will be worth a trip to an Old Calendar parish -- assuming that we aren't all on the same calendar by then, which we won't be, given the speed at which the Orthodox Church changes.
Great and Holy Saturday coincides with Annunciation in 2018.