Day of the Week LeetCode solution in JavaScript

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/**
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 * @param {number} day
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 * @param {number} month
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 * @param {number} year
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 * @return {string}
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 */
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var dayOfTheWeek = function (day, month, year) {
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  var map = {
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    0: "Sunday",
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    1: "Monday",
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    2: "Tuesday",
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    3: "Wednesday",
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    4: "Thursday",
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    5: "Friday",
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    6: "Saturday",
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  };
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  var date = new Date(`${month}/${day}/${year}`);
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  return map[date.getDay()];
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};