Spreadsheet: 115098d1310727149-accurate-calculation-of-the-difference-between-two-dates-hopefully-the-best-date-difference-calculator-ever
Sheet: Sheet1

Date difference calculator
Input start date | 1973-03-17 00:00:00 | 1973-03-17 00:00:00
Input end date | 1989-03-17 00:00:00 | 2011-03-18 00:00:00
get the starting year
End of starting year date is
Days till the end of the starting year
get the ending year
get the start of ending year
Days till the start of ending year
Difference between the years
Add the days
the decimal in days
Yearfrac gives...
the decimal in days
365.25 rounded to 2dp gives
the decimal in days
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