/today

script

function insertTextPosAtEnd(p_strText) {
	editor.setSelectedText(p_strText);
	editor.setSelectedRange(editor.getSelectedRange()[0] + editor.getSelectedRange()[1], 0);
	editor.activate();
}

function getOrdinalNum(n) {
  return n + (n > 0 ? ['th', 'st', 'nd', 'rd'][(n > 3 && n < 21) || n % 10 > 3 ? 0 : n % 10] : '');
}

const monthNames = ["January", "February", "March", "April", "May", "June",
  "July", "August", "September", "October", "November", "December"
];

var today = new Date();
var m = monthNames[today.getMonth()];
var d = getOrdinalNum(today.getDate());
var y = today.getFullYear();

var ordinalToday = "[[" + m + " " + d + ", " + y + "]]";
insertTextPosAtEnd(ordinalToday);
draft.update();