Add timestamp to Header

My supervisor requested that I add a timestamp to the header so that everytime
the page refreshes, the current time shows. I don’t know why he wants it but
I’ll abide. Anyone do this before? I assume I’d just have to use the time()
function and format it the way I need it but if someone has already done it and
can provide the code that would make things a lot simpler.

Thanks
Mathew
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