Hi So I just figured out how to fix your problem, I had to make an account just to answer this because I don't think someone gave you the answer you were looking for.
What you do is the following:
Whatever source you are coping into excel, in my case I was copying my source from an SQL database, and one of the columns contained rows that started with jun1065, mar1598, sep1478, and Excel would automatically turn these into dates. PRETTY ANNOYING TBH.
So what you do is copy the data into a text editor. I used 'Notepad'. Once it is in notepad you are going to save it to whatever name you like, here is the
Key part:
In the encoding option, the default is ANSI, you are going to change it to ***UTF-8*** ****
After this is done, you can close the text editor, you are going to open excel, and open a
new document. You go to the location of the document and switch the 'All excel Files' to 'All files', now you will be able to see your text document that contains all of your data. When you open your text document.
it will show you the Text Import Wizard menu and you chose the options you want for delimited or fixed with. **The file origin should already be in UTF-8**
Click next, choose the delimiters options you want, (in my case separate by tab).
Click next and in column date format, I chose General and then FINISH.
And that's it!
All of your data should be formatted as you want it now, without excel changing the some data to dates automatically.
Hope this works for you!
Thanks,