Reformat Date

Problem statement

Given a date string in the form Day Month Year, where:

• Day is in the set {"1st", "2nd", "3rd", "4th", ..., "30th", "31st"}.
• Month is in the set {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"}.
• Year is in the range [1900, 2100].

Convert the date string to the format YYYY-MM-DD, where:

• YYYY denotes the 4 digit year.
• MM denotes the 2 digit month.
• DD denotes the 2 digit day.

Example 1:

Input: date = "20th Oct 2052"Output: "2052-10-20"

Example 2:

Input: date = "6th Jun 1933"Output: "1933-06-06"

Example 3:

Input: date = "26th May 1960"Output: "1960-05-26"

Constraints:

• The given dates are guaranteed to be valid, so no error handling is necessary.

My solution

/**
 * @param {string} date
 * @return {string}
 */
var reformatDate = function(inputDate) {
    const months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
    
    const [date, month, year] = inputDate.split(/\W/);
    
    const formatDate = parseInt(date, 10);
    const formatMonth = months.indexOf(month);
    const formatYear = parseInt(year, 10);
    
    const correctDate = new Date(formatYear, formatMonth, formatDate);
    
    // console.log(correctDate, formatYear, formatMonth, formatDate)
    
    return correctDate.toISOString().substring(0, 10);
};