How many seconds are in a 100 years?

Answer 1

approx = 100*365*24*60*60

Some exceptions to this rule are required since the duration of a solar year is slightly less than 365.25 days. Years that are integer multiples of 100 are not leap years, unless they are also integer multiples of 400, in which case they areleap years.[3][4] For example, 1600 and 2000 were leap years, but 1700, 1800 and 1900 were not. Similarly, 2100, 2200, 2300, 2500, 2600, 2700, 2900 and 3000 will not be leap years, but 2400 and 2800 will be. Therefore, in a duration of two millennia, there will be 485 leap years. By this rule, the average number of days per year will be 365 + 1/4 − 1/100 + 1/400 = 365.2425, which is 365 days, 5 hours, 49 minutes, and 12 seconds.