easter_date() in JavaScript

I'm making a calendar generator in JavaScript. I need the Unix Timestamp for easter day midnight, for a given year. How can I do that (in JavaScript)?

PHP's function can be found here.

According to this:-

function Easter(Y) {
    var C = Math.floor(Y/100);
    var N = Y - 19*Math.floor(Y/19);
    var K = Math.floor((C - 17)/25);
    var I = C - Math.floor(C/4) - Math.floor((C - K)/3) + 19*N + 15;
    I = I - 30*Math.floor((I/30));
    I = I - Math.floor(I/28)*(1 - Math.floor(I/28)*Math.floor(29/(I + 1))*Math.floor((21 - N)/11));
    var J = Y + Math.floor(Y/4) + I + 2 - C + Math.floor(C/4);
    J = J - 7*Math.floor(J/7);
    var L = I - J;
    var M = 3 + Math.floor((L + 40)/44);
    var D = L + 28 - 31*Math.floor(M/4);

    return padout(M) + '.' + padout(D);
}

function padout(number) { return (number < 10) ? '0' + number : number; }

Example usage:-

for (let year = 2015; year < 2030; ++year) {
    console.log(year, Easter(year));
}

Output:-

2015 '04.05'
2016 '03.27'
2017 '04.16'
2018 '04.01'
2019 '04.21'
2020 '04.12'
2021 '04.04'
2022 '04.17'
2023 '04.09'
2024 '03.31'
2025 '04.20'
2026 '04.05'
2027 '03.28'
2028 '04.16'
2029 '04.01'