.AT 17 MINUTES and 40 few seconds past eight at night, Greenwich Method Time, on July 20th it will be actually precisely 55 years given that Neil Armstrong arrived at the Moon. Those 55 years amount to 20,089 days. Of those, 20,062 were 86,400 secs long and 27 one second longer due to the add-on of surge seconds, a technique begun in 1972.
So those 55 years will definitely amount to 1,735,689,627 seconds.