.AT 17 mins and 40 secs past eight in the evening, Greenwich Mean Opportunity, on July 20th it will certainly be actually exactly 55 years given that Neil Armstrong arrived at the Moon. Those 55 years add up to 20,089 times. Of those, 20,062 were 86,400 secs long and also 27 one 2nd longer because of the addition of leap seconds, a practice begun in 1972. So those 55 years are going to add up to 1,735,689,627 seconds.