VIDEO : How Zelda Williams Copes on Father's Birthday

Zelda Williams wanted to express how hard a day like today is for her because this would have been her father, Robin Williams? 65th birthday. The actress wrote on Instagram, ?Still not really sure what to do on days like today." Zelda added that she tried to help three causes this year to commemorate her father?s birthday: Rescue dogs, people suffering from disabilities, and our nation?s wounded warriors. Williams took his life in 2014 after it was revealed he was suffering from a brain disease called Diffuse Lewy Body Dementia.