National Donor Sabbath is observed annually two weekends before Thanksgiving, from Friday through Sunday. This three-day observance seeks to include the days of worship for major religions practiced in the United States. During National Donor Sabbath, faith leaders from many religions, donor families, transplant recipients, and donation and transplantation professionals participate in services and programs to educate the public about the need for the lifesaving and healing gifts passed to others through transplantation, while also encouraging people to sign up in their state registry as organ, eye and tissue donors.