Attached a workbook of what I see. On column A and B there are dates with time on a "m/dd/yyyy hh:mm:ss" format.
Until a while ago excel 2010 would recognize the dates and I was able to find the time difference between the 2 just by typing =B1-A1 (column C)
I think due to a Microsoft update (?) I cannot do it anymore and excel will not recognize the info?
Would you know how I can fix this?
Thanks
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