|Scrooge and Bob Cratchit illustrated by John Leech in 1843 (Photo credit: Wikipedia)|
After he sees the ghosts and has his epiphany, he insists on buying the biggest turkey the poultrymonger has, to provide the Cratchits with an amazing Christmas dinner. This is seen as a great example of how he's changed.
...Which means the poultrymonger is working on Christmas.
So, to recap: Bob Cratchit working Christmas is bad, and Scrooge is a miser. Poultrymonger working Christmas is good, and Scrooge is generous.
I feel like there's a moral to that story somewhere. Merry Christmas if you celebrate, and happy holiday-of-choice (or just Wednesday) otherwise.