MediaWiki:EthTime.js

$(function () {
    var ethTimeDiv = document.getElementById('eth-time');
    const now = new Date();
    
    var result = now.getUTCFullYear() - 2000;
    var decimal = Math.ceil((now - new Date(now.getFullYear(),0,1)) / 86400000);
    decimal = decimal/356;

    result += decimal;
    result *= 100;
    result = Math.round(result);
    result /= 100;

    ethTimeDiv.innerHTML = result + "Ð";
}());