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<html><body><h2>JavaScript Dates</h2><p>Calculate the number of years since January 1, 1970.</p><p id="demo"></p><script>// Calculate milliseconds in a yearconst minute = 1000 * 60;const hour = minute * 60;const day = hour * 24;const year = day * 365;// Divide Date.now() with a yearlet years = Math.round(Date.now() / year);document.getElementById("demo").innerHTML = years;</script></body><!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_now2 by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 21 Dec 2022 17:39:07 GMT --></html>