Here is a sheet which contains a list of datetime data, and you cannot quickly determine the datetime is in AM or PM. In this case, I introduce a way to extract the AM or PM from the datetime to the next column to help you easily determine the datetime.
With one simple formula, you can quickly extract and determine AM or PM from the datetime.
Select a cell next to the datetime you want to use, type this formula =IF(MOD(A2,1)>0.5,"PM","AM"), press Enter key, and drag the autofill handle over cells you want to work. See screenshot:
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