Passover / Pesach dates for month of Nisan in Western calendar (2016 - 2017) - April

from "Chabad dot-org" =
The holiday of Pesach, or Passover, falls on the Hebrew calendar dates of Nissan 15-22. Here are coinciding secular dates for the upcoming years:
2016:   April 22-30
2017:   April 10-18
Note: The Jewish calendar date begins at sundown of the night beforehand. Thus all holiday observances begin at sundown on the secular dates listed, with the following day being the first full day of the holiday. (Thus, the first Passover seder is held on the evening of the first date listed.) Jewish calendar dates conclude at nightfall.
The first two days of Passover (from sundown of the first date listed, until nightfall two days later) are full-fledged, no-work-allowed holiday days. The subsequent four days are Chol Hamoed, when work is allowed, albeit with restrictions. Chol Hamoed is followed by another two full holiday days.