Christmas 2013 shaped up as the biggest challenge ever for everyone working anywhere within the retail supply chain and logistics world. The number of gifts bought from retailers — both online and in brick-and-mortar stores — will probably hit an all-time record. Yet, because of a quirk in the calendar this year, the holiday shopping season in the U.S. is as short as it possibly can be — 26 days, down nearly a week from 32 days last year.