const dates_str = ['2022/03/20', '2022/05/21', '2022/01/13', '2022/01/14', '2022/05/20'];
const dates = [];
for (let i = 0; i < dates_str.length; i++) {
dates.push(new Date(dates_str[i]));
}
for (let i = 0; i < dates.length; i++) {
console.log(dates[i].toDateString());
}
/*
run:
"Sun Mar 20 2022"
"Sat May 21 2022"
"Thu Jan 13 2022"
"Fri Jan 14 2022"
"Fri May 20 2022"
*/