And if Caitlyn's kids had anything to do with it, the day looks like it was an emotional one full of love.
Even though this is the family's first Father's Day without Bruce, who publicly transitioned into Caitlyn this year, Caitlyn seems to be living up to her earlier promise that she will always be "Dad" to the Jenner kids.
Kendall Jenner was first to honor her dad, with a photo posted to Instagram of Bruce kissing her on the cheek as a young girl.
"my whole life this soul was my daddy and just because your appearance is different now doesn't mean you were any less of a father to me my entire life," Kendall wrote. "happy Father's Day to the person who raised me, and taught me everything I know, my hero."
Kendall's older half-sister, Khloé Kardashian, was next, posting a sweet photo of Bruce and her late father, Rob Kardashian.
"Thank you Lord for blessing me with not one phenomenal father but I was lucky enough to have two," Khloé captioned the sweet snap. "Happy Father's Day!!!"
And Kylie Jenner, posting a family photo of herself, Kendall, Bruce and mom Kris Jenner, used Caitlyn's own words in a sweet tribute.
"'You can still call me dad, Kylie. No matter what I'm always going to be your father. That's never going to change,' she wrote in the caption, along with her own message: "Happy Father's Day my little light of sunshine."
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