How many days is 60 hours?
In a single calendar year there are 365 days, but every four
years a leap year occurs and one day is added to make 366 days for
that year. To account for this extra day you must figure out how
many times a leap year would occur in 60 years. 60 divided by 4 is
15, so there will be 15 extra days. To figure out how many days are
in 60 years, first multiply 60 by 365, which equals 21,900 days and
then add the 15 leap days. 21,900 days + 15 days = 21,915 days.
There are 21,915 days in 60 years.