Ok, here are my calculations:
Beginning of Jesus' ministry
The beginning of Jesus’ ministry was marked by His baptism, which, according to Luke 3:1 occurred in the 15th year of the reign of Tiberius Caesar. Unlike the Persian calendar, the Jews in New Testament times used the non-accession year dating, or inclusive reckoning. This means that when a monarch ascended the throne, the first incomplete calendar year (no matter how small) was counted as the first year. Since Tiberius ascended the imperial throne on 19 August 14 AD, his “fifteenth year” would be the twelve months beginning 1 Ethanim (September/October) 27 AD by the non-accession reckoning of the Jews. Since Jesus’ ministry lasted 3½ years according to the Gospel’s record (see below for this date), Jesus’ Baptism occurred about October/November, 27 AD.
Thus, we find the beginning of the final week of the 70 weeks when Messiah would “confirm covenant with many for one week”, namely, 27 AD. This suggests that it was the official transition from the “Old Covenant” to the “New Covenant” as promised in Jer 31:31-34 and fulfilled in Matt 26:28, Mark 14:24, Luke 22:20, 1 Cor 11:25 by Jesus.
End of Jesus' ministry, the Crucifixion
The Gospel of John records at least three Passovers (John 2:13, 6:4, 13:1) and almost certainly a fourth in John 5:1.
Jesus’ death in 14th of Nissan, was at Passover. This can be confirmed using the usual dating systems by finding a year in the range 30 AD to 33AD in which the Jewish Passover fell on Friday. Since we do not have definitive and precise information about the Jewish calendar (specifically the occurrence of “leap years” with the second Adar), such methods depend more on what is unknown than known. Even astronomical methods cannot help because they depend upon local meteorological conditions such as cloud obscuring a new moon. However, the overwhelming consensus from such methods, despite their limitations suggests that the crucifixion must have occurred during the Passover in Nisan (March/April), either in March, 30 AD, or, April, 31 AD. The former is too early as already shown (Jesus’ ministry lasted more than 2½ years), but the second accords with the known facts.
Despite the insuperable difficulties in knowing the local calendar of 2000 years ago, there are still a very limited range of possible dates from which to choose. If we accept that Jesus died on the afternoon of Friday, 14th of Nisan, then the first of Nisan must be at sunset on Friday, about 18:00 local time. In the years 30-33, there are only two years that are even possible, namely,
- 30 AD when New Moon occurs at 20:07, Wed, Mar 22 local time. Thus, Nisan 1 would begin about 1 day and 22 hours later on Mar 24. This accords with the Babylonian calendar (not used in Jerusalem) but such an event is almost too soon in date and too soon after sunset to be reliably seen.
- 31 AD when New Moon occurs at 13:53, Tues, Apr 10 local time. Thus, Nisan 1 would begin about 3 days and 4 hours later on Apr 17. This is more credible.
Thus, Jesus appears to have been crucified in April 31 AD, 3½ after His baptism.
τὸ πάσχα ἡ ἑορτὴ τῶν Ἰουδαίων, than the other two,τὸ πάσχα τῶν Ἰουδαίων. This is a huge problem to his forged document theory. Why would anyone forge a document to add a Passover and then fail to use the same language? The explanation is John 6 takes place at Pesach Sheni. This settles every objection. Jesus did not need to be in Jerusalem for Pesach Sheni which occurs after the barley harvest. The subtlety of barley bread (John 6:9) available after First Fruits is lost on Rood who instead focuses on leaven. – Revelation Lad Mar 06 '24 at 23:58