Join Comcast NBCUniversal on Saturday, April 21, 2018 for the 17th annual Comcast Cares Day, a celebration of their year-round commitment to volunteerism.This year, Comcast will engage their one millionth Comcast Cares Day volunteer! Want to be a part of making change happen in hundreds of communities across the country and around the world? Sign up for a project today – and make a difference tomorrow.