Commentator Gary Joiner builds the historical case for why the autumnal equinox should matter today, even when it doesn't feel like fall in the Deep South.

Press Image / LSU Shreveport

With the new calendar year, people automatically greet each other with a "Happy New Year." But history has a few things to say about what calendar system is crunching the numbers. Commentator Gary Joiner interweaves math and religion in this installment of History Matters.