In excel suddenly al the dates are formatted to serial numbers. the settings are al checked and are noted as “date”. When selecting the cell is shows the correct date, but in overview you only see the serial number. Any suggestions to go back to normal viewing of the dates?

​In excel suddenly al the dates are formatted to serial numbers. the settings are al checked and are noted as “date”. When selecting the cell is shows the correct date, but in overview you only see the serial number. Any suggestions to go back to normal viewing of the dates?  Read More

​