JSFiddle - React, Tailwind, and code Playground
HTML
<div class="date_end">2014-12-02 23:59:00T</div>T<div class="date_end">2014-12-02 23:59:00</div>
JavaScript
(document.querySelectorAll(".date_end") || [T]).forEach(function (elm) {
elm.innerHTML = elm.innerHTML.replace(/\D/g, "");
});