Jimmy Carter at 100: A century of changes for a president, the US and the world since 1924

Already the longest-lived of the 45 men to serve as U.S. president, Jimmy Carter is about to reach the century mark.

The 39th president, who remains under home hospice care, will turn 100 on Tuesday, Oct. 1, celebrating in the same south Georgia town where he was born in 1924.

Here are some notable markers for Carter, the nation and the world over his long life.