Have you been noticing more pizza commercials than usual? It's because pizza season kicks off on Thanksgiving Eve. Pizza sales on Thanksgving Eve, according to a Market Watch report, rival those of New Year's Eve, New Year's Day and Halloween.

The idea is that families are "looking for something easy, low-priced and broadly appealing" as they're preparing their Thanksgiving meal. Another big reason is the staggered arrival time of various incoming family members.

The Thanksgiving Eve competion is intense because pizza chains are tryring to win customer loyalty that will sustain through all the other big pizza-ordering days that follow.