MediaWiki:EthTime.js

$(function () {
    var ethTimeDiv = document.getElementById('eth-time');
    const now = new Date();
    
    var year = now.getUTCFullYear() - 2000;
    var decimal = Math.ceil((now - new Date(now.getFullYear(),0,1)) / 86400000);
    if (now.getUTCFullYear() % 4 === 0) {
        decimal = decimal/366;
    }
    else {
        decimal = decimal/365;
    }

    ethTimeDiv.innerHTML = year + "." + decimal + "Ð";
}());