.AT 17 mins and 40 seconds previous 8 in the evening, Greenwich Mean Time, on July 20th it are going to be exactly 55 years since Neil Armstrong arrived at the Moon. Those 55 years amount to 20,089 days. Of those, 20,062 were 86,400 seconds long and also 27 one 2nd longer thanks to the addition of leap seconds, a technique begun in 1972. So those 55 years will certainly amount to 1,735,689,627 few seconds.