freecodecamp--freecodecamp/curriculum/challenges/english/blocks/daily-coding-challenges-javascript/69a890af247de743333bd4d0.md

id, title, challengeType, dashedName

id	title	challengeType	dashedName
69a890af247de743333bd4d0	Challenge 227: Cooldown Time	28	challenge-227

--description--

Given two timestamps, the first representing when a user finished an exam, and the second representing the current time, determine whether the user can take an exam again.

• Both timestamps will be given the format: "YYYY-MM-DDTHH:MM:SS", for example "2026-03-25T14:00:00". Note that the time is 24-hour clock.
• A user must wait at least 48 hours before retaking an exam.

--hints--

canRetake("2026-03-23T08:00:00", "2026-03-25T14:00:00") should return true.

assert.isTrue(canRetake("2026-03-23T08:00:00", "2026-03-25T14:00:00"));

canRetake("2026-03-24T14:00:00", "2026-03-25T10:00:00") should return false.

assert.isFalse(canRetake("2026-03-24T14:00:00", "2026-03-25T10:00:00"));

canRetake("2026-03-23T09:25:00", "2026-03-25T09:25:00") should return true.

assert.isTrue(canRetake("2026-03-23T09:25:00", "2026-03-25T09:25:00"));

canRetake("2026-03-23T11:50:00", "2026-03-25T11:49:59") should return false.

assert.isFalse(canRetake("2026-03-23T11:50:00", "2026-03-25T11:49:59"));

--seed--

--seed-contents--

function canRetake(finishTime, currentTime) {

  return finishTime;
}

--solutions--

function canRetake(finishTime, currentTime) {
  function parse(ts) {
    const parts = ts.split(/[-T:]/).map(Number);
    const [y, m, d, h, min, s] = parts;
    return Date.UTC(y, m - 1, d, h, min, s);
  }

  const finishMs = parse(finishTime);
  const currentMs = parse(currentTime);

  const cooldown = 48 * 60 * 60 * 1000;

  return currentMs - finishMs >= cooldown;
}