Kaylin Schimpf, from Texas, encouraged men to get behind the camera and capture family moments, including “messy hair, no makeup or a dirty old t-shirt”.
Schimpf said too often, women are ones behind the camera.
“It doesn’t matter what she looks like, or if she tells you no, take the photo,” she wrote on Facebook, addressing dads on 3 September.
“You may not think about it often, or at all honestly, but how many photos does she capture of you, of your family and of your life you’ve built?
“When she is gone, those photos won’t show your children the women who was behind the camera.”
Schimpf shared a black and white photo of a mother and daughter to accompany her message to dads.
“No woman wants to look back at a lifetime of selfies,” she added.
“Do what she does for you every day, and snap a few moments in time. Be proud. Take photos of her. Before kids and after.”
Schimpf told The Huffington Post UK her father passed away a year ago and she realised shortly after she had no photos with him.
She said she doesn’t yet have children of her own, but she and her partner have discussed why taking photos of each other is so important.
“I realised if I didn’t say something about it, some day our future kids would have no photos of me young or old,” she said.
“It actually was written after we had a fight because he never took my photo!”
The post was shared 30,000 times in just over a week. It attracted thousands of comments from mums tagging their partners, encouraging them to read the status.
“Yes I hope that my partner will take the ‘in the moment photos’ of me with them so [my kids] have more then just selfies with me,” one mother wrote.
Another wrote: “I have very few if any photos with my kids when they were growing up because I was always hiding from the camera.
“Now those times are gone and I would give anything to get them back.”