How to add A time element with a machine-readable datetime attribute

<!DOCTYPE html> <html> <body> <h1>The time datetime attribute</h1> <p>I have a date on <time datetime="2017-02-14 20:00">Valentines day</time>.</p> <p><b>Note:</b> The time element does not render as anything special in any of the major browsers.</p> </body> </html>