falls this Sunday, June 16.
In honour of all the world's great dads, here are 21 who have gone the extra mile for their kids.
"She wanted to be a wolf for Halloween and this was the only wolf costume at the store," Redditor Paper_liger wrote.
" I looked up and saw the little red riding hood costume and knew I had to do it."
Dicken Schrader lives in Bogotá, Colombia, where he plays Depeche Mode cover versions with his incredibly cute kids.
Dicken's pretty easy on the eye himself, which obviously has nothing to do with this clip's 1.7m views.
Because your kids don't care if you're a rock god. No siree.
And left a note pinned to the fridge for him.
"The culmination of 2.5 years of parenting," writes dad and YouTuber Jesse Teeters.
"Our first duet."
Those of us who can barely get it together to construct a ham sandwich in the mornings really hate this guy.
But what does the F stand for?
Guess what? It's the same guy as #1. Chapeau, sir.
“For those that say I endanger my child: it’s more likely that you will fall while walking on the sidewalk than I will while skating with my daughter.”
Nils Pickert's five-year-old son likes to wear dresses. In cosmopolitan Berlin that's not such a big deal, but in a small town in southern Germany Nils makes sure that the locals always have somebody else to point at.
An old favourite, snapped in Boston a couple of years ago. History does not record how the rest of this family's evening went, but we presume it was awesome.
(Yes, there's a mom in there too. Mammies can be cool. Sometimes).
It kicks in at 1.05, Captain Impatient.
Rick Van Beek's daughter Madison (14) has severe cerebral palsy, leaving her confined to a wheelchair and with the functions of a three-month old.
But she loves to be outdoors, so Rick competes in triathlons and adventure races with her - pushing her in a specially-adapted buggy for the running bit, towing her in a kayak for the swimming and pulling her in a trailer for the cycle section.
For the transitions, he carries her.
To date 'Team Maddy' have completed over 70 races.
Stand up Jon Cain of Lancaster, Ohio.
We all love Wonder Woman, right lads? But this… this is devotion to the cause.
Brazilian web designer Christian Diego Mello and his 2-year-old son Diogo, a recent addition to 'Internet Dads' Hall of Fame'
NPH and partner David Burtka always go the extra mile at Halloween.
Because screw cerebral palsy.
Yes, that is a Star Wars AT-AT Walker, the work of Jim Belosic, who we wrote about here.
Normal life is hard for kids with medical problems. But not impossible.
Because dressup and duets don't a great father make, it's time, love and patience.
And your kids think you're the bee knees, even if you've never been on YouTube.