Former President Jimmy Carter celebrates his 90th birthday on Oct. 1, 2014. On Thursday, March 21, 2019, Carter became the longest-living former president in U.S. history. Keep clicking to see some memorable moments from his life and career. Here, Carter gives 11-month-old Maggie Shoulta a hug as she enjoys a cup of homemade ice cream during his birthday party at Maxine Reese Park on Sept. 28, 2014, in Plains, Georgia.