I'm averaging dates in Excel and getting a number I don't understand. Why?

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Grade: Education Subject: Support
I'm averaging dates in Excel and getting a number I don't understand. Why?
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Excel stores dates as sequential serial numbers. When you average dates, you're averaging these serial numbers. The result is also a serial number, which Excel displays as a date. To understand the result, change the cell format to 'General' or 'Number' to see the underlying serial number.