[hombre_fatal]

Once Chrome's print dialog pops up, you can expand "More settings" and then uncheck "Headers and footers".

[hnthroaway1926]

thanks, worth noting that the print dialog does not support that option when using Firefox on Windows

[frosted-flakes]

I think you need to open it in Print Preview to change those settings, which is accessible in the main menu (there's not a keyboard shortcut, unfortunately).