Web site contents sometimes are updated or changed very often, so that it is a good idea to print date and even time on page header / footer in order to note when precisely the web site contained the information printed on page.
Internet Explorer print code &t allows to print time in format according to Regional Settings in Control Panel, for example
10:41:06 PM or
To print web page printing time as in Regional Settings, input &t either into header or footer field in Page Setup window.
|&t||Time in the format specified by Regional Settings.||10:41:06 PM|