The Feast of Early Firstfruits is Nisan 17 on the Jewish calendar. In the year of Jesus’ crucifixion, that was a Sunday, by our terminology. By my own reckoning, based on astronomical new moon tables, I believe that the resurrection occurred on April 7, AD 30.
So why do I show this on “Nisan 16 or 17″ on the table of feasts? It isn’t because I question the date, but simply because the subject of the table is not specifically the resurrection, but rather the date of the feast, Early Firstfruits, or Yom haBikkurim, as celebrated by Israel. Lev 23:10-11 (CJB) says
 “Tell the people of Isra’el, ‘After you enter the land I am giving you and harvest its ripe crops, you are to bring a sheaf of the firstfruits of your harvest to the cohen.  He is to wave the sheaf before ADONAI, so that you will be accepted; the cohen is to wave it on the day after the Shabbat.
The question of the day was, which Shabbat (Sabbath); the first day of the Feast of Unleavened Bread, or the normal weekly Shabbat? Modern Jewish calendars follow the view of the Pharisees, who insisted on the latter; but in the First Century, the Sadducees controlled the Temple and the calendar, and they held to the former.
So, even though Jewish calendars today show Yom haBikkurim on Nisan 16, which was a Saturday in 30 AD, Jesus was indeed the embodiment of the resurrection theme of the feast, and He rose from the dead on the exact day of the celebration!