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HTML

            
              <h1>DateTime ISO-8601 Extractor</h1>
<small>Pattern like: <mark>1994-11-05T08:15:30-05:00</mark> or <mark>1994-11-05T13:15:30Z</mark> </small><br>
<small>It's not for this pattern: <mark class='orange'>20150930T012823Z</mark> (without punctutu)</small>
<input id='input' onclick="this.select()" oninput="document.getElementById('output').innerHTML=extractAll(this.value)" placeholder="paste ISO 8601 date-time format here" size='40' type="text">
<div id="output" class='res'>
  <span class='faded' id='result'>Result</span>
</div>
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CSS

            
              body {
    background: #eee;
    text-align: center;
}

body,
input {
    font-family: consolas, monaco, menlo, courier, monospace;
    box-sizing: border-box;
}

input {
    padding: 10px 20px;
    margin: 30px auto;
    border-radius: 6px;
    font-size: 1.2em;
    background-color: azure;
    display: block; 
    max-width: 100%;
    text-align: center;
}

input:focus {
    outline: none;
    background-color: #fff;
}

.res {
    font-size: 2em;
}

.faded {
    color: #bbb;
}

hr {
  width: 500px;
  max-width: 100%;
  border:0;
  border-bottom: 1px solid #fff;
  background-color: #ccc;
  height: 1px;
}

.orange {
  background-color: orange;
}
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JS

            
              function extractAll(a) {
    "use strict";
    var buff, date, monthNames, day, month, year, hour, minute, second, plusMinus, tz, output;
    if (a.length) {
        //By the power of Regular Expression
        if (/^\d+-\d{2}-\d{2}T\d{2}\:\d{2}\:\d{2}(\.\d+)?(([\-\+]\d{2}\:\d{2})|Z)$/.test(a)) {
            buff = a.split("T");

            date = buff[0].split("-");
            day = date[2];
            month = date[1];
            year = date[0];

            buff = buff[1];
            buff = buff.split(":");
            hour = buff[0];
            minute = buff[1];
            second = buff[2];

            buff = buff.join(":");
            if (/\+/.test(buff)) {
                plusMinus = "+";
            } else if (/-/.test(buff)) {
                plusMinus = "-";
            } else if (/Z/.test(buff)) {
                plusMinus = "Z";
            }
            buff = buff.split(plusMinus);
            tz = plusMinus === "Z"
                ? ""
                : plusMinus + buff[1];
            second = second.split(plusMinus)[0];

            monthNames = "January,February,March,April,May,June,July,August,September,October,November,December";
            monthNames = monthNames.split(",");

            output = "Date: <mark>" + monthNames[Number(month) - 1] + " " + day + ", " + year + "</mark>" +
                    "<br><hr>Time (24h): <mark>" + hour + ":" + minute + ":" + second + "</mark>" +
                    "<br><hr>Time Zone Designator: <mark>UTC" + tz + "</mark>";
        } else {
            output = "<code style='color:red'>invalid input</code>";
        }
    } else {
        output = "<span class='faded'>Result</span>";
    }
    return output;
}
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