On God’s Calendar, it is the start of the New Year the First month is Abib or Aviv or Nissan
1 Let there be an observing of the month of Abib, and you must celebrate the Passover to Jehovah your God, because in the month of Abib Jehovah your God brought you out of Egypt by night (Deuteronomy 16).
2This month will be the start of the months for you. It will be the first of the months of the year for you…
5 …you may pick from the young rams or from the goats.
6 And it must continue under guard until the 14th day of this month…
11 …and you must eat it in haste. It is Jehovah’s Passover (Exodus 12: 2-11).
The Passover is still celebrated by Jews today and is in late March/Early April, on Nisan14. It occasionally coincides with ‘Good Friday’ (well, statistically every 7 years). Of course it coincided in 33 CE, when Jesus was killed, since Jesus was killed on the Jewish Passover, he being the greater Passover lamb.