Why-in-the-world then are we celebrating Easter (His resurrection) this year almost a month ahead of time on March 27?
Here's why ....
The Emperor Constantine took the early church's observance of Biblical feast days off the Jewish calendar, arguing it was a decision motivated by anti-Semitism and “Jew hatred.” Quoting the Emperor Constantine at the Council of Nicea in AD 325:
“When the question relative to the sacred festival of Easter arose, it was universally thought that it would be convenient that all should keep the feast on one day; it was declared to be particularly unworthy for this, the holiest of festivals, to follow the customs (the calculation) of the Jews who had soiled their hands with the most fearful of crimes, and whose minds were blinded."
“In rejecting their custom we may transmit to our descendants the legitimate mode of celebrating Easter; We ought not therefore to have anything in common with the Jew, for the Savior has shown us another way; our worship following a more legitimate and more convenient course (the order of the days of the week). And consequently in unanimously adopting this mode, we desire, dearest brethren to separate ourselves from the detestable company of the Jew. For it is truly shameful for us to hear them boast that without their direction we could not keep this feast.”
Christ died on Passover. He was buried on the Feast of Unleavened Bread. He rose on the Feast of First Fruits. Not when the "Easter Bunny" supposedly rambles through the culture, making a mockery of His sacrifice.
Unfortunately, the same is true with the traditional date celebrated for the birth of Christ (Dec 25). There is zero evidence that Christ was born on Dec 25 (Gregorian calendar.) On the other hand, there is compelling evidence as I argued here that Christ was actually born on the Jewish Feast of Tabernacles (equates to Sep/Oct on the Gregorian calendar).
It's time for the church to realign with the Jewish (Biblical!) calendar. We miss so much of the powerful symbolism inherent in Christ's fulfillment of the Jewish (Biblical) feast days ... and instead focus on such cruel distractions as the Easter Bunny and Santa Claus.