On Fri, Jul 3, 2015 at 12:27 PM, <matt...@jenika.com> wrote: > I have a need to compute a year with fraction between two dates. > > Meaning date 1 = 2005-05-04 date 2 = 2015-05-06 then the year I’m after is > 10.0054794520548. > > My thinking on the above is neither 2005 or 2015 is a leap year so I > should use a devisor of 365 days and the number of days extra between the > above two dates is 2 so 2/365 is 0.0054794520548. > > Based on the above thinking I need to determine two things to do the above > generically. > > 1) what devisor to use 365 or 366 (depends on if either the start or end > year is a leap year) > > 2) exactly how many days exist between the start date and end date minus > all the extra years. >
What about the number of hours in the day? That varies for some days in many time zones.
