<p>EST is UTC -5, so subtract accordingly. Then subtract 12:00 from whatever your new time is. So if it’s 24:00, subtract 5:00 to get to EST (you’re going back a day as well), then subtract another 12:00 to convert to the 12 hour AM/PM clock. </p>
<p>16 May 24:00 GMT -> May 15th 19:00 EST -> May 15th 7:00pm EST</p>