my spreadsheet keeps formatting 10-12 as 10 Dec, how do i stop it

[Guest]

10-12 is a size not a date, although I have formatted the cell as text, it
keeps reverting to custom

 

[RagDyer]

Preceede your data entry with an apostrophe [ '10-12 ], which will *not* be
displayed in the cell, but will be visible in the formula bar.
--

HTH,

RD
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10-12 is a size not a date, although I have formatted the cell as text, it
keeps reverting to custom

 

[jo]

formatting the cell as textUnfortunatley this solution does not work.

If i format the cell as and preceed with a ' and save the file or
re-opening the file it has reverted to 10 Dec.

I am saving the file as a txt file because I need it like that to
import to another program