Most Americans likely won't be dashing through the snow for Christmas, given this year's unseasonably warm weather, but many may need to dash to the store for last-minute dinner ingredients or essentials. Most major retail stores and grocery chains are closed on Christmas Day, with a few notable exceptions.

Walmart is making changes to keep shelves stocked and popular gifts available, helping shoppers avoid sold-out items this holiday season.

Here's what you need to know about banks and shipping services, whether they will be open on Christmas Eve and Christmas Day this year.