If numbers keep changing to dates automatically in Excel or if Excel changes dates to random numbers then this post will help you fix the issue.

Changing the number format from Date to Fraction doesn't work if the cell already contains a date. You must make the formatting changes before you add the values.

If the Excel cell format is not changing to a number because the Number formatting is not working, take these steps to fix the issue.

Isolate a specific value, such as a number value in cells that contain both numbers and letters by using the Excel MID function. Click in the cell where you will display the value you want to isolate.

First, typing currencies manually could lead to number format inconsistencies, where some cells are formatted as a financial value, and others are not.