Is Dennys Open On Christmas Day 2025. All locations are open for christmas day and christmas eve. That’s right, you can count on denny’s to serve up your favorite diner food all day, every day, christmas eve and christmas day included.

The popular diner chain caters to its customers’ needs by staying. From wanting to escape another family conversation to just craving that grand slam breakfast, many people will be cheerful because denny’s is open on christmas day.