.AT 17 mins as well as 40 secs past 8 at night, Greenwich Mean Time, on July 20th it will certainly be actually exactly 55 years due to the fact that Neil Armstrong arrived on the Moon. Those 55 years amount to 20,089 days. Of those, 20,062 were actually 86,400 secs long and also 27 one 2nd longer because of the addition of surge seconds, a practice begun in 1972. So those 55 years will certainly add up to 1,735,689,627 seconds.