function nextDay(y, m, d) {
  let setDate = new Date(y, m - 1, d);
  let tomorrowDate = new Date(y, m - 1, setDate.getDate() + 1);
  console.log(
    `${tomorrowDate.getFullYear()}-${tomorrowDate.getMonth() +
      1}-${tomorrowDate.getDate()}`
  );
}