Shavu'ot (Pentecost) in 2016 provides another clear illustration of the disconnect between the popular Easter-based "Pentecost Sunday" and the true, Biblical Pentecost (Shavu'ot) counted 50 days from the first Sunday following The Passover.
In CE 2016, Easter fell on March 27 — while the Hebrew Passover (Nisan 14) fell on April 22. The true Biblical Shavu'ot (Pentecost) therefore fell on June 12 — weeks after the traditional Christian "Pentecost Sunday."
This discrepancy of weeks illustrates precisely why the Antipas Foundation emphasizes that Christians must understand the Hebrew calendar and its relationship to the life, death, and resurrection of Christ Jesus. A false Pentecost, counted from a false Resurrection day, produces a false Church calendar.
See FAQ 06 — What Are the Hebrew High Holy Days? for the full explanation of the three God-ordained High Holy Days.