How to Add Auto Date to Word Documents. Microsoft Word enables you to create professional-looking documents, such as letters, forms and advertisements, for your business.

The date and time format you chose will appear in the document. How to insert a date in Word that updates automatically On the Insert tab in the Text group, click the Insert Date and Time button.

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.