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I'm using Excel 2010 and I'm trying to edit dates in a column, but I notice that when I click in a cell, make no edits then hit enter, this strangeness occurs:

First, I click in the cell:

Click in the cell...

Then double click as if to edit...:

enter image description here

Then hit enter after no touchy poo...

enter image description here

Look at that! Now its some bizzare format I do not recognize. And wait, if I do the drop down undo button, this is what I see:

enter image description here

Does that shed any light? If it does, maybe it will help me actually successfully edit because when I do type something in there--even if it what was already there--it gives me this:

enter image description here

What exactly is going on here?

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41288 is just another format from Excel - in fact, it's "no format": Excel stores dates internally as number of days passed since 1/1/1900. Therefore, 41288 is the internal representation of 01/14/2013. Change the format back to date, as LuckySpoon suggested and it should solve the issue! – Peter Albert Jan 18 '13 at 7:28

You'll most likely find that the cell isn't being formatted as a date correctly. Right click -> Format Cell choose the appropriate Date format and it should pop right back into being a date again (as Excel stores dates as numbers and then formats to suit)

Provided A29 isn't also a formula, drop the leading 0 (just for consistency, probably won't make a difference but you never know)

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