.AT 17 moments and 40 secs past 8 at night, Greenwich Way Time, on July 20th it will be specifically 55 years given that Neil Armstrong arrived on the Moon. Those 55 years add up to 20,089 days. Of those, 20,062 were actually 86,400 seconds long and 27 one 2nd longer because of the add-on of jump secs, a practice begun in 1972.
So those 55 years will definitely amount to 1,735,689,627 seconds.