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

This article will teach you how to change the date format in Microsoft Excel to have a uniform structure across your spreadsheet.

How to Reformat a Date in Excel. When you enter a date in one format on a Microsoft Excel worksheet and then want to change the order of the day, month and year, try accessing the Format Cells ...

Open the Excel 2010 file that you want to make format changes to. Select the top-left cell in the range of cells that you want to change to the accounting format.

Use Microsoft Excel's TODAY() function in simple expressions to highlight the current date and past and future dates.