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

How to Auto Populate the Date in Excel. When you're setting up a Microsoft Excel spreadsheet that contains date information, you'll speed your task if you let Excel do the tedious work of filling ...

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

Microsoft Word has a date field, but it's not easy to use in an expression. If you need to update dates in a document, use Excel to calculate the dates and then run a mail merge.

Use Excel's named ranges and tables to simplify your formulas. This makes them more understandable and prevents errors. A well-organized sheet is key to writing seamless formulas.