Matthew Poole and continuators on Luke 2:42

42 And when he was twelve year old, they went up to Jerusalem, after the custom of the feast.

It is said by those who are learned in the Jewish Writings, that till a Child was of this Age▪ he was not obliged by the Law to go. We have in Scripture nothing to ascertain us in the Case, it is certain that our Saviour went at this Age, after the Custom of the Feast, that is, so as to be there about the fourteenth Day of the Month, Nisan.