Adam Clarke on John 2:13

And the Jews' passover was at hand - This was the reason why he stayed but a few days at Capernaum, Joh 2:12, as he wished to be present at the celebration of this feast at Jerusalem.

This was the first passover after Christ's baptism. The second is mentioned, Luk 6:1. The third, Joh 6:4. And the fourth, which was that at which he was crucified, Joh 11:55. From which it appears,

1. That our blessed Lord continued his public ministry about three years and a half, according to the prophecy of Daniel, Dan 9:27. And,

2. That, having been baptized about the beginning of his thirtieth year, he was crucified precisely in the middle of his thirty-third. See Martin.