This year is the 20th anniversary of the day and the organisers have suggested 20 ways to celebrate, including taking your dog out for a walk, adopting a dog or donating blankets to a local rescue centre.

The day hopes to educate anyone thinking of getting a dog about how important it is to go to an animal shelter or pet store that looks after the dogs well.

Colleen who created the day, also started National Puppy Day, National Mutt Day and National Cat Day.

If you’re a dog lover you might feel like you know a lot about dogs, but keep reading to see if your knowledge is at pet-expert level or a little ‘woof’ around the edges.

We’d also love to know how much you adore your dogs, so head to the comments below and let us know.