No, I did not say that Nisan 14 was a sabbath, I said that the events following the lord’s meal must have ended or gone through a sabbath if the assertion is that the lord’s meal, as JWs imply, happens on Nisan 14 after sundown. I was merely pointing out the logical error that if you put the Lord’s meal on the beginning of Nisan 14, the earliest he could’ve died and still fit in all the events was Nisan 15, and that is ignoring lots and lots of things that would still not make sense (like a lot of the legal procedures would need to starting and ending that night, as if a Roman was going to rise from his bed to adjudicate some poor sap).
The Bible puts the day of death on EITHER Nisan 14 or Nisan 15 depending on the gospel and tradition says Nisan 14 was a Friday at about 3pm (because he needs to be taken down, wrapped and buried by 6pm). My opinion, as is that of most Bible scholars and churches is that the day of the Lord’s supper must have happened on that Wednesday or perhaps earlier (Nisan 12 for a death to happen by 3pm of Nisan 14). You keep implying there is a fixed date of Nisan 14, as JWs hold, in which everything, including the meal, must take place within ~20 hours, including the requisite two days of trial for a capital punishment, but it simply isn’t supported by Biblical or contemporary sources.