Watch World Kindness Day in action. Spoiler alert: It happens year-round.

Kindness comes in all forms and even the smallest gesture can fill someone's heart when they really need it.

World Kindness Day is marked internationally every year on Nov. 13, but the videos below show that special acts involving generosity and time happen all the time. It's no coincidence that these are also some of our most-viewed stories of the year.

So go out and create your own kindness! Bonus points if you make someone's day without them knowing it was you, like all the people who bought a struggling author's book and turned it into a bestseller practically overnight.

Watch the video below to see how a 16-second Tiktok video posted by the novelist's daughter sparked a widespread chain of goodwill:

Watch dad's emotional reaction to finding out his book is a bestseller

Thanks to a viral video, Author Lloyd Devereux Richards' crime thriller climbs to the top of Amazon's bestsellers ten years after it was published.

Humankind, Marguerite Richards

Loneliness, particularly among seniors, can create a deep void. So when a family of seven moved into a new community, they 'adopted' their elderly widowed neighbor as an honorary grandpa:

Family of 7 takes in elderly neighbor as honorary grandpa

After Paul Callahan's wife died, a neighboring family of seven ensures the 82-year-old is invited to every holiday, cookout and household gathering.

Humankind, Paste BN

The power to spread joy can happen at any age. Watch an 8-year-old boy's reaction when he gets his first-ever birthday party from his young classmates:

Thoughtful kids surprise classmate with his first-ever birthday party

Ángel David from Ebéjico, Colombia, grew up with limited resources and has never had a birthday party before. So his classmates threw one for him.

In the video below, a barber entertains children with special needs who fear getting a haircut. No tears and he does it all for free:

Good News: Barber helps kids overcome fears one cut at a time

Vernon Jackson, an Ohio barber who donates haircuts for kids with special needs, entertains Ellison so the little boy doesn’t fear the salon chair.

Humankind, Paste BN

When friends were playing 'ding dong ditch' at random houses, this teen decided to leave a message of kindness on a neighbor's doorbell cam:

Teen spreads message of kindness during 'ding dong ditch' with friends

When friends were randomly ringing doorbells and then running away, 13-year-old Jacksen Proell decided to spread a message of kindness instead.

Humankind, Paste BN

The runners in the video below wouldn't let a fellow racer poised to take second place give up just before the finish line. Watch what they did instead:

Cross country runners help opposing team member win second place

These two cross country runners that helped an opposing team member win second place are the definition of having a winning character.

USA Today

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