Mesore is the 12th Egyptian month with the Egyptian New Year on Thoth 1. The Jewish New Year occurred on Tishri 1, the 7th Hebrew month. The referenced text calls out Kislev, the 9th Hebrew month. Since the dated text reads Kislev 21, the Jewish New Year occurred 2 months and 21 days before November 11, 460 BC, between August 23-25.

Some may believe that August 23-25 would be too early for the Jewish New Year in 460 BC. However, the late August date aligns with the modern Hebrew calendar. In the modern Hebrew calendar, every 19 years (235 lunar cycles) are about equal to 19 solar years. The lunar orbit is 2 hours, 4 minutes, and 24 seconds longer for every 19 year cycle. Carrying the calculation back to the 5th century BC, a period of 2,500 years equals a difference of 11½ days. In the 20th century, September 5 is the earliest date possible for the Jewish New Year. Carrying the difference of 11½ days back to the 5th century BC shows that the August 23-25, 460 BC date for Tishri 1 aligns with the modern Hebrew calendar..

The August 23-25 date for Tishri 1 means that Nisan 1 occurred as early as February 28, 460 BC. So the Passover could have occurred as early as March 14 in the 5th century BC. The papyrus discussed here sets ideal limits for calculating the date of the crucifixion in the 1st century AD.