In case you do not want to use the predefined date or time format, you can change them in Google Sheet and Excel Online. For your information, you do not need to use an add-on or any other third ...

Using Excel's number format tool means you can ensure your spreadsheet both looks the part and handles your data exactly how ...

Like Microsoft Excel, you can change the formatting of date and time in Google Sheets as well. For that, select the cell where the date/time is visible, go to Format > Number, and select ...