What is the meaning of a lead apostrophe in an Excel file cell that causes incorrect formatting when reading in the import Excel file?

I am using Excel 2010.

In worksheet SampleA, I look at 1 cell, A14, and the value in the cell is 09/22/2014 and its correspoding value in the formula bar is 9/22/2014. If I look at Fomat Cells, under the Number tab, I see
Category: Customer
Type: mm/dd/yyyy

In the same workbook, in worksheet SampleB, I look at cell, A14, and the value in the cell is 09/22/2014 and its corresponding value in the formula bar is '09/22/2014. If I look at Format Cells, under the Number tab, I see:
Category: Customers
Type: mm/dd/yyyy

What causes the formula bar value in the 2nd worksheet to begin with 1 leading ' (apostrophe) before the date?

This leading apostrophe seems to be responsible for causing this particular records from being imported from an Excel record into a Sybase table. This record is bypassed for what seems to be a formatting error.
zimmer9Asked:
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Glenn RayExcel VBA DeveloperCommented:
I've never heard of being able to create a custom category name like "Customer" or "Customers."  I presume the category name is actually "Custom", right?  :-)

The leading apostrophe is forcing the date to appear as a string value instead of a date.   You can't do a search and replace on the apostrphes to remove them, but you could add a helper column to produce the date values and then replace those values on the original data.

Insert a temporary column in column B, then add the following formula in cell A2 and copy down:
=DATEVALUE (A2)

Then, copy and paste these values (Edit, Paste Special, Values) over the original data in column A.  Remove the helper column.  You should then be able to import this data into Sybase.

Regards,
-Glenn
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Rory ArchibaldCommented:
Or to convert in place, just select the data, then Data tab, Text to columns, Delimited, leave all options blank in step 2, and in the last step of the wizard choose Date (MDY) and Finish.
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