Changing date format in excel for mac

Question

I have a list of about 300 dates that I wish to reformat. Some are displayed as dd-mm-yyyy and others as ddd/mm/yyyy. I need to change to mm/dd/yyyy in mass (not one at a time). Can anyone help?

Answer 1

@J W Norris

Could you please check which cell format do you set for these dates? Such as General, Date, Custom.

Besides, do you mean one date format is "dd-mm-yyyy", and the another one is "dd/mm/yyyy"?
If yes, you could try the formulas to convert the date format.

I creat a simple sample as following.

The formula could be =Text(Date(Right(A2,4),Mid(A2,4,2),Left(A2,2)),"mm/dd/yyyy").

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