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<html><body><h1>JavaScript Dates</h1><h2>The getTime() Method</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 Time with a yearconst d = new Date();let years = Math.round(d.getTime() / year);document.getElementById("demo").innerHTML = years;</script></body></html>