Premiere of Magnolia Pictures' "World's Greatest Dad" - ArrivalsIt's been almost two years since Robin Williams died, and the distance hasn't made that tragedy any easier for his family. This week, on the anniversary of what would have been the late actor's 65th birthday, his daughter, Zelda Williams, remembered her beloved father with a heartfelt tribute on social media.

As she's done in the past, the younger Williams took to Instagram to discuss her late father, sharing a sweet family photo of her and her siblings with their dad. Williams wrote that she's "Still not really sure what to do on days like today," noting that she "can't give [him] a present anymore."

Instead, Williams wrote, she has decided to give to the charity Freedom Service Dogs of America in his name, which according to actress, benefits three causes close to her father's heart: "rescue dogs, people suffering from disabilities, and our nation's wounded veterans."

"They rescue pups from shelters and train them so that they can be paired with someone in dire need of their help and companionship," Zelda wrote. "Thought you'd get a kick out of furry, four legged friends helping change the world, one warrior in need at a time."

Williams ended her message to her father by saying she and her siblings "all love you and miss you like crazy."

Robin Williams committed suicide on August 11, 2014. It was later disclosed that he had been suffering from depression for many years, and Zelda Williams has since publicly urged others dealing with the disease to seek treatment. "[F]or those suffering from depression, I know how dark and endless that tunnel can feel," she wrote last fall, "but if happiness seems impossible to find, please hold on to the possibility of hope, faint though it may be."

[via: Zelda Williams, h/t The Huffington Post]

Photo credit: Getty Images