Ever noticed the flood of commercials for engagement rings and diamonds around November?  Or the spike in perfume commercials in early February? 

Are you overwhelmed by ads for allergy meds and home repair stores? 

You’re not alone, and it’s intentional — there’s a calendar for the cycle of advertising and marketing, and it exists because it works … and that’s because of our shopping habits. 

So how does it work? Therese Wilbur of USC’s Marshall School of Business lays out the calendar for us. 

Listen using the player above.