You can change the date & time format in Google Sheets & Excel Online using this guide. Use different date & time formats in spreadsheets.

It's easy to change the date format in Microsoft Excel. You just need to use the "Date" drop-down menu, which gives you plenty of options.

How do I change a number into a date format in Excel? Microsoft Excel has a feature that allows you to convert a number into a date, which is quite simple to do.