Christmas doesn’t start on Dec. 1 at the Artz home in Greeley. It doesn’t begin after Thanksgiving or after Halloween. The Artz family starts getting into the Christmas spirit as they’re getting tan. “We start singing Christmas carols in September,” Adam Artz said. “I joke (that) I’m the only guy in Colorado who is getting a sunburn while he’s putting up his Christmas lights.” When it comes to everything Christmas, the family “sleighs.” However, when it comes to their Christmas lights display, it’d be hard to find a brighter home in Weld County than their home at 1712 37th Ave. On Thursday, Dec.