I have Windows / Excel 2016 on a 64-bit, Intel(R) Core(TM) i7-8550U CPU @ 1.80GHz 2.00 GHz with 8GB RAM. My spreadsheet either spontaneously changed the "date" formatting, or I inadvertently performed a keyboard shortcut resulting in the same.
The date column is/was formatted as: 1/1/2000. But all of a sudden any dates, old or newly added, are shown in the DATEVALUE format (45105 = date 6/28/2023,) even though that column's formatting still indicates the DATE format as 1/1/2000. In fact, if I type a date in any other cell anywhere else in this spreadsheet page - regardless of another format, the same DATEVALUE number is shown, and never the desired date.
I have other "worksheets" in this workbook and none of them display this error. I tried copy/paste values from a correct cell in another worksheet; tried to convert "TEXT" formatting to the format 1/1/2000, but to no avail. I've been using Excel for over 20 years and have never encountered this error before. Any assistance would be appreciated Thank You!