User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36 Build Identifier: e5f16313668ac592c1bfb310f4390624e3dbfb75 One cell in the sheet does not return mathematical operations even after formatted. Instead, after typing "=1+2" it returns "02/01/00". Tried formatting the sheet, but the same cell still does not calculate. Reproducible: Always Steps to Reproduce: I'm not sure how I did it, but it happened to several cells in the sheet while I was calculating something basic like "=(20/5)*3" Actual Results: 11/01/00 Expected Results: 12 Reset User Profile?No
Make sure you also have no style or conditional format applied that contains a date format.