Q: Here’s a question that has stumped our staff. Why is there no “First Sunday in Ordinary Time?”
A: Basically, there isn’t room for one. If we designated the Sunday after Baptism of the Lord as the First Sunday in Ordinary Time, we’d have to account for the weekdays that precede it.
It’s a small but significant matter that Sundays are “in” Ordinary Time but “of” Advent, Lent and Easter. The calendar is trying to show there’s a difference.