This morning, thanks to iTunes shuffle mode, two of the warmest tunes in my library ended up back to back; Oscar Peterson's sublime version of "Away In A Manger" flowed into "Merry Christmas Darling" by The Carpenters. The piano and flugelhorn carry the Christmas warmth instrumentally in "...Manger," while Karen Carpenter conveys equal warmth vocally.
I never mind hearing Christmas tunes that convey the warmth of the season--even in May.