Kourtney shared a throwback photo on Instagram of herself with her dad and Kim at what appears to be a Christmas celebration. Kourtney wears a white dress with a tiered skirt, while Kim sports a frilly pink dress.
"Daddy's girls," she captioned the picture. "Happy Birthday Daddy. I miss you every day. Kim wasn't as happy about her dress as I was."
Kim said in a post on her own account that she celebrated by ordering her dad's favorite cake.
"Happy Heavenly Birthday Dad! Miss you so bad. I ordered your favorite Ralph's cake to celebrate! Love you forever!" she wrote.
Rob, meanwhile, shared a throwback photo on Twitter of himself with his dad.
"Happppy Birthday Dad!!" he wrote, adding smiley face and angel emojis.
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Robert died at age 59 in September 2003 after battling esophageal cancer.
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