Our December 2018 wallpaper/calendar features the level 4 single story "Speedy and Boomer's New Job." How does Santa deliver so many presents on Christmas Eve? Rudolph the Red-Nosed Reindeer explains how time zones work to Speedy and Boomer, the two newest reindeer on the job. Learn about time zones and get ready for Christmas with our "Speedy and Boomer's New Job" wallpaper/calendar.