Okay, don't shoot me. I would put a nice spring or summer fabric as the backing. I have made several Christmas Runners and table toppers and I always make the backing (floral or red, white, blue, or spring, or Fall) fabric totally different so that when the holiday is over, they can flip it over and use it again with a non-holiday or another holiday.
Everyone that I have ever given one of these runners/table toppers have appreciate the fact that they can use it another month with a different theme. My thoughts!!!!!