If you have kids young enough not to really care or notice -- why not do it? Change the date. Save some money. Relax and enjoy it.
Why do we do it? Because I like to soak in the holiday all the more. I need those extra few days to bake some more cookies for Santa or to make another gingerbread house. And why not? JIm, my husband, calls me the CEO of our house. I make that executive decision and enjoy it.
Just email Santa and tell him to come a few days later. Works well with the Gannon Gang.