John 2:13

“And the Jews’ passover was at hand, etc.] That feast which was kept on the fourteenth day of Nisan, in commemoration of the Lord’s passing over, and by the houses of the Israelites, when he slew the firstborn in Egypt: and it is called the Jews’ passover, because they only were obliged to keep it: nor was it obligatory upon the Gentiles; and, besides, was now abolished when John wrote this Gospel, though still retained by the Jews. And moreover, John was now among the Gentiles, and for whose sake he penned this Gospel; and therefore so distinguishes this feast, which was typical of the Christian passover, or of Christ our passover that is sacrificed for us. This was the first “passover”…”

“The Jews’ passover - The feast among the Jews called the Passover. See the notes at Matthew 26:2-17. And Jesus went up to Jerusalem - Every male among the Jews was required to appear at this feast. Jesus, in obedience to the law, went up to observe it. This is the first Passover on which he attended after he entered on the work of the ministry. It is commonly supposed that he observed three others one recorded Luke 6:1; another John 6:4, and the last one on the night before he was crucified, John 11:55. As his baptism when he entered on his ministry had taken place some time before this - probably not far from six months - it follows that the period of his ministry was not far from three…”

“2:13 Passover, an annual spring festival, commemorated Israel’s rescue from slavery in Egypt (Exod 12). Jews traveled to Jerusalem to participate in the festival (Deut 16:1-16). Because John refers to three Passover festivals (John 2:13; 6:4; 11:55), many conclude that Jesus had a three-year public ministry.”

“passover: Joh 2:23, Joh 5:1, Joh 6:4, Joh 11:55; Exo 12:6-14; Num 28:16-25; Deu 16:1-8, Deu 16:16; Luk 2:41 John 2:14”