How to: Insert date and time in header.
Solution:
Display the header or footer dialog box and click 'Date' and 'Time's on the toolbar.
1) Select the 'View' menu and select 'Header and Footer'. (Word automatically places the document in Page Layout view.)
2) Position the insertion point inside the first header. (The document text is dimmed and the header/footer will be represented by a dotted box.)
3) Click 'Date' and 'Time's on the toolbar.
'Date and Time's
4) Click 'Close'.