Re: Happens in Google sheets as well.
Happens in Google sheets as well. Enter "10-12" to indicate pages 10 and 12 and you get Dec 10th or 12th Oct depending on your locale.
For additional fun share a spreadsheet with people on different locales and ask them to fill the cells. Happened on an onedrive-shared Excel file. it was so annoying I had to split the date into three columns.