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<!DOCTYPE html> <html> <body> <p>Click the button to display the number that represent this month.</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { var d = new Date(); var n = d.getMonth(); document.getElementById("demo").innerHTML = n; } </script> <p><strong>Note:</strong> 0=January, 1=February etc.</p> </body> </html>