Edit a cell's value from "01/01/2022" to "01/01/2023" without changing its ISTEXT status

Hi, this is seemingly a very simple task but I can't seem to get around it.

Keep in mind that the initial format of the date cells must remain the same.

That is, for example, =ISTEXT(B1)=TRUE and ISNUMBER(B1)=FALSE. The format in the home tab should show "Date", as it is currently.

For me, any attempt to transform 01/01/2022 (cell B1), into 01/01/2023, changes the formatting (the status of ISTEXT and ISNUMBER), which is what I'm trying to avoid.

There might be some funky cell formatting going on that causes the issue, but I can't seem to put my finger on it. Thanks again for any help/advice.