.AT 17 mins as well as 40 seconds past 8 at night, Greenwich Mean Time, on July 20th it will certainly be specifically 55 years since Neil Armstrong landed on the Moon. Those 55 years add up to 20,089 days. Of those, 20,062 were actually 86,400 secs long and 27 one second longer due to the addition of surge secs, a technique started in 1972. So those 55 years will amount to 1,735,689,627 seconds.