"In the Year 2525 (Exordium and Terminus)" is a hit song from 1969 by American pop-rock duo Zager and Evans. It reached number one on the Billboard Hot 100 for six weeks commencing July 12, 1969. The song was written by Rick Evans in 1964 and originally released on a small regional record label (Truth Records) in 1968. A year later, an Odessa, Texas, radio station popularized the disc, which RCA Records quickly picked up for nationwide distribution.

"In the Year 2525 (Exordium and Terminus)" opens with the words "In the year 2525, If man is still alive, If woman can survive, They may find...". Subsequent verses pick up the story at 1010-year intervals from 2525 to 6565. Disturbing predictions are given for each selected year. In the year 3535, for example, all of a person's actions, words and thoughts will be preprogrammed into a daily pill. Then the pattern as well as the music changes, going up a half step in the key of the song, after two stanzas, first from A flat minor, to A minor, and, then, finally, to B flat minor, and verses for the years 7510, 8510 and 9595 follow.