Thank you for your replies. I am trying the DAYS360, but I need to know the exact number of years, months and days. I cannot use 7.5 for 7 months and ... days. And yes, the standardized tests require we use the 30 days/4 weeks constraint, but some round up and some do not. So for some tests...
We do standardized tests on children evaluate for developmental delay. I am trying to set up an excel form to calculate the chronological age - the tests assume that each month has 30 days and 4 weeks. I tried the calculation from MS resource page and am off by one day for some children.
Any...
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