Returns the minimum of the given dates
const tips_minDate = dates => new Date(Math.min(...dates));
const array = [
new Date(2016, 4, 13),
new Date(2018, 3, 12),
new Date(2016, 0, 10),
new Date(2017, 0, 9)
];
console.log(tips_minDate(array)); // 2016-01-08T22:00:00.000Z