Project Gasbuggy was an underground nuclear detonation carried out by the United States Atomic Energy Commission on December 10, 1967 in rural northern New Mexico. It was part of Operation Plowshare, a program designed to find peaceful uses for nuclear explosions.
Project Gasbuggy was carried out more than 9000 days ago.
9000 days is 24.66 years and 1967 was 52 years ago. It's difficult because I used 9000 days as the measurement.