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

Excel for the web now supports conditional formatting, and the interface is easier to use than the desktop edition. Susan Harkins shows you how to use it.

Conditional formatting highlights key information in a spreadsheet so it’s easy to see at a glance. This beginner’s guide gets you started using conditional formatting.

Excel's conditional formatting lets you formats cells based on the value of those cells or their formulas. Learn the basics of this amazing feature.

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