.AT 17 moments and 40 secs past 8 in the evening, Greenwich Way Opportunity, on July 20th it will definitely be exactly 55 years because Neil Armstrong arrived at the Moon. Those 55 years add up to 20,089 days. Of those, 20,062 were actually 86,400 secs long and 27 one second longer because of the addition of surge secs, a method begun in 1972. So those 55 years will add up to 1,735,689,627 seconds.