Should true followers of Yahushua celebrate Easter?

Here is a very concise article about this subject:

http://www.askelm.com/news/n010412.htm

Yahushua's resurrection day memorial would not always fall on a Sunday - it will change from year with the Scriptural lunar calendar- Sunday has no relevance. Passover moves as well, "Yahushua's Supper" is not always on the same day every year. Let's stick to keeping Yahushua's Supper at Passover, whichever day of the week it happens to fall in any given year, as in Luke 22.19, Yahushua said, “This do in remembrance of me.”