Per Shemot (Exodus) 12: An unblemished lamb or goat is to be set apart on Nisan 10 and slaughtered on Nisan 14 and then to be roasted and eaten "that night" Nisan 15 with unleavened bread and bitter herbs.
15 Nisan: The evening of the Passover seder commemorating the day Israel is redeemed.
16 Nisan: The second Passover seder is celebrated in the Diaspora (outside Israel)--a tradition harkening back to when Jews outside Israel could not be exactly certain when Passover was occuring in Israel.
Fyi: Calenders are tricky things. Which is why we have leap years in the Gegorian calendar, and an extra 30 day month named Adyar II in the Hebrew one. Passover is a harvest festival and is a celebration of Spring (renewal) much as Easter is. Thus, to follow Scripture, Pesach follows the vernal equinox (14 Nisan).
I'm not sure what you and Hammer are arguing over. But if the question is "When is a Hebrew 'day'?" the answer is: from sundown to sundown.
Leviticus 23: 4 “‘These are the LORD’s appointed festivals, the sacred assemblies you are to proclaim at their appointed times: 5 The LORD’s Passover begins at twilight on the fourteenth day of the... more
Re: How do you explain this?: History,Fri Apr 29 23:58