How many seconds 2000 years?

Answer 1

Taking into account the Gregorian leap year rules there are

146,097 days in 400 years

the calendar repeats itself only after 400 years

2000 / 400 = 5 repetitions evenly

that's 146,097 days x 5 repetitions = 730,485 days in 2000 years

there are 86,400 seconds in a day hence

730,485 days x 86,400 sec/day = 63,113,904,000 seconds in 2000 years