JSFiddle - React, Tailwind, and code Playground

JavaScript

document.write(
    new Date("2006/11/01").getTime()/1000
    +"<br>1162357200 is the value PHP provides (one hour later)"
    +"<br>"+
    new Date("2006/11/01")
    +"<br>PHP is basing it off of GMT-0500 at that time."
    +"<br>Convergence returns on the Monday later: <a href='http://ideone.com/t1MUp'>Monday 06, 2006</a>"
    +"<br>"+new Date("2006/11/06").getTime()/1000
    +"<br>"+new Date("2006/11/06")
    +"<br><br>All correct 'Fall back' offsets:<br>"+
    new Date("2007/11/04") + "<br>" +
    new Date("2007/11/05") + "<br>" +
    new Date("2008/11/02") + "<br>" +
    new Date("2008/11/03") + "<br>" +
    new Date("2009/11/01") + "<br>" +
    new Date("2009/11/02") + "<br>" +
    new Date("2010/11/07") + "<br>" +
    new Date("2010/11/08") + "<br>" +
    new Date("2011/11/06") + "<br>" +
    new Date("2011/11/07") + "<br>"

    +"<br><br>All correct 'Spring forward' offsets:<br>"+
    new Date("2007/03/11") + "<br>" +
    new Date("2007/03/12") + "<br>" +
    new Date("2008/03/09") + "<br>" +
    new Date("2008/03/10") + "<br>" +
    new Date("2009/03/08") + "<br>" +
    new Date("2009/03/09") + "<br>" +
    new Date("2010/03/14") + "<br>" +
    new Date("2010/03/15") + "<br>" +
    new Date("2011/03/13") + "<br>" +
    new Date("2011/03/14") + "<br>"
);