Yep... Global Fat Bike Day is tomorrow, 12/3/16. It's a real thing. There are several local places tomorrow that have rides going on, as well as sites around the world - Google it for your area. For those in the SLC area there is a ride scheduled for 8:00 am at the Little Valley Trailhead in Corner Canyon. It may be a good opportunity to get a look at the Fatbike community.
Axe - If you are interested I will throw in my spare fatty... PM'd you the number.