.AT 17 MINUTES and 40 seconds past 8 in the evening, Greenwich Mean Time, on July 20th it are going to be actually specifically 55 years considering that Neil Armstrong arrived at the Moon. Those 55 years amount to 20,089 days. Of those, 20,062 were 86,400 seconds long and 27 one second longer thanks to the addition of leap seconds, a strategy begun in 1972. So those 55 years are going to amount to 1,735,689,627 seconds.