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2025-12-28 20:50:08 +00:00
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import toDate from "../../toDate/index.js";
import requiredArgs from "../requiredArgs/index.js";
export default function startOfUTCISOWeek(dirtyDate) {
requiredArgs(1, arguments);
var weekStartsOn = 1;
var date = toDate(dirtyDate);
var day = date.getUTCDay();
var diff = (day < weekStartsOn ? 7 : 0) + day - weekStartsOn;
date.setUTCDate(date.getUTCDate() - diff);
date.setUTCHours(0, 0, 0, 0);
return date;
}