We want Christmas to be merry and bright, but sometimes the season can be challenging. Our two stories, presented by guest host Cynthia Nixon, do deliver good cheer in the end (and Nixon shares a few of her own holiday traditions). In Laurie Notaro’s “O Holy Night, or The Year I Ruined Christmas” there’s a hideous Christmas tree, and a demanding parent with a long memory. The hilarious tale is read by Kirsten Vangsness. In Jeanette Winterson’s luminous “Spirit of Christmas” a married couple set off for their holiday with frayed tempers and too much stuff. They wind up with nothing but a miracle. Christina Pickles is the reader.