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var date = new Date("2015-08-25T15:35:58.000Z");
var seconds = date.getTime() / 1000; //1440516958
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function getDaySeconds(date = new Date()) {
const d = new Date(date);
const h = d.getHours();
const m = d.getMinutes();
const s = d.getSeconds();
return (h * 60 * 60) + (m * 60) + s
}