If Sears still exists by then, there's now an extended return period, like most stores do this time of year...
" Most items purchased between 11/1 -12/24 will have an extended return period through 1/31/19. Members have 45 days for most non-delivered/installed items or 1/31/19, whichever is better. Items sold by third party sellers, floor care equipment, vacuums, major home appliances, sewing machines, water treatment, plumbing, heating equipment, mattresses and items with return policy period less than 30 days are not covered by the extended Holiday Return Policy. Terms of standard policy (including, but not limited to, non-returnable items, restocking fee, original packaging, etc.) apply. "