날짜 관련 함수

// UTC기준 (협정 세계시, 1970년 1월 1일 UTC 자정과의 시간 차이를 밀리초 단위로 표기)
console.log(new Date());
console.log(new Date('Jun 5, 2022'));
console.log(new Date('2022-12-17T03:24:00'));

console.log(Date.now());
console.log(Date.parse('2022-12-17T03:24:00'));

const now = new Date();
now.setFullYear(2023);
now.setMonth(0); // 0: 1
console.log(now.getFullYear());
console.log(now.getDate()); // 0: 1
console.log(now.getDay()); // 0 일요일일부터, 1... 6: 토요일
console.log(now.getTime());
console.log(now);

console.log(now.toString());
console.log(now.toDateString());
console.log(now.toTimeString());
console.log(now.toISOString()); // ISO 8601 형식
console.log(now.toLocaleString('en-US'));
console.log(now.toLocaleString('ko-KR'));

• MDN Date: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date