John the Baptist began his ministry in the fifteenth year of Tiberius Caesar (Lucas 3:1). Tiberius became Caesar (emperor) after the death of Augustus Caesar on  August 17 of the 14 C. E. The first year of his ascension to the throne of Caesar from 17 August until Rosh Hashana (October 13 of the 14 C. E. ) and so on we have 15 years until the 27 C. E. To make the arithmetic easier count two years in 14. C.E. and add the thirteen years left and you end up with 27 C.E.

 

If we speculate that John began his ministry within one month before the Rosh Hashana (Festival of Trumpets), this has much prophetic sense as the ten days of awe or reflection until the Day of Atonement (Yom Kippur) are very much in agreement with the preaching of John the Baptist. If Y’shua was baptized shortly before or after Rosh Hashana in the 27 C. E. this meets perfectly with the prophecy of the prophet Daniel for the three and a half years, half of the week “years” (Daniel 9:26 ) , forty and two months, 1260 days of the Messiah’s ministry until the year 31 C.E. when the full moon (for the Passover set-apart appointed time) for the month of Abib landed on Wednesday. This fits perfectly with the requirement for the sign of Jonah (Mat 12:39-40) to be fulfilled together with a Saturday late afternoon resurrection.

 

The year 31 A.D. works best! On that year, Nissan (Abib) 14 lands on Wednesday April 25th per the astronomical model from the “The United States Naval Meteorology and Oceanography Command (NMOC)”.

 

http://www.judaismvschristianity.com/Passover_dates.htm

 

The First Day of the unleavened bread (Nissan 15) IS the Sabbath not the Passover proper which is known also as preparation day. The sign of the prophet Jonah requires three days and three nights. With crucifixion & death by mid afternoon and burial on Wednesday just before sunset you have three nights and three days fulfilling the sign of Jonah. Y’shua resurrected before the weekly Sabbath ended exactly 72 hours after His death. This was discovered after the weekly Sabbath ended, still on Saturday but already on the first day of the week by Jewish reckoning, when the women rushed to the tomb to perform embalming rites.