‘And his parents went every year to Jerusalem at the feast of the passover.'
Year by year Jesus' parents went up to the Passover. This does not mean that they only went up at Passover time, for this is rather an introduction to a particular Passover visit. We in fact know from elsewhere that the family also went up at other times (John 7:2-10). Originally all male Jews were called on to go to the Sanctuary three times a year for the three great feasts, but those who now lived further away were excused from this duty. They were, however, still expected to make an effort to attend in Jerusalem at least once a year, and their being accompanied by their womenfolk had become the norm.
Thus we continue to learn that Jesus' parents were faithful to their belief, and regularly attended the Passover. No wonder then that He grew up increased in wisdom and in favour with God and man (Luke 2:52).