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import { DateObject } from "react-multi-date-picker";
const julianDay = new DateObject().toJulianDay();
const days = new DateObject().add(56, "years").add(8, "months").add(17, "days").toDays();
console.log(new DateObject().add(56, "years").add(8, "months").add(17, "days").toDate());
const epoch = julianDay - days