Hi Jose,

I understand your frustration with Excel's automatic date formatting. Fortunately, there is a way to turn off this feature and prevent Excel from changing your data without your permission.

Here are the steps to disable automatic date formatting in Excel:

1. Select the column(s) that you want to prevent from being automatically formatted.
2. Right-click on the selected column(s) and choose "Format Cells" from the context menu.
3. In the "Format Cells" dialog box, click on the "Number" tab.
4. In the "Category" list, select "Text".
5. Click "OK" to close the dialog box.

By following these steps, you have now formatted the selected column(s) as text, which means that Excel will no longer automatically format any data entered into those cells.

If you have already entered data into the column(s) and Excel has automatically formatted some of the entries as dates, you can convert them back to text by selecting the column(s), choosing "Text to Columns" from the "Data" tab in the ribbon, and then selecting "Text" as the column data format in the "Convert Text to Columns Wizard".