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

You can insert or add Header and Footer in Excel spreadsheet using this tutorial. Insert page number, current date and time, etc.

If you want to add a header or footer to all sheets, select every sheet by right-clicking one of the sheet tabs at the bottom of the Excel screen and clicking "Select All Sheets" in the pop-up menu.

Here are six tips to turn you into a spreadsheet pro whether you're using Microsoft Excel or Google Sheets. Alphabetize your data You can customize your spreadsheet data a number of ways ...

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.

Susan Harkins shows you how to combine a function and conditional formatting to highlight weekends and holidays using Excel.