const oarr = [
{ day: 677, date: new Date('2022-02-18') },
{ day: 981, date: new Date('2022-01-21') },
{ day: 152, date: new Date('2023-01-30') },
{ day: 809, date: new Date('2022-02-17') },
];
console.log(oarr);
/*
run:
[
{ day: 677, date: 2022-02-18T00:00:00.000Z },
{ day: 981, date: 2022-01-21T00:00:00.000Z },
{ day: 152, date: 2023-01-30T00:00:00.000Z },
{ day: 809, date: 2022-02-17T00:00:00.000Z }
]
*/