neemzy/counter.php

## counter.php
<?php

$naow = new DateTime(date('Y-m-d').' 00:00:00');
$last = new DateTime('2017-09-08 00:00:00'); // date of last working day

/**
 * @param DateTime $date
 *
 * @return bool
 */
function isBusinessDay(DateTime $date)
{
    if (in_array(
        $date->format('Y-m-d'),
        // exclude holidays
        [
            '2017-07-14',
            '2017-08-15'
        ]
    )) {
        return false;
    }

    return $date->format('N') < 6;
}

function countBusinessDays(DateTime $start, DateTime $end)
{
    $count = 0;

    while (intval($start->format('Ymd')) <= intval($end->format('Ymd'))) {
        if (isBusinessDay($start)) {
            $count++;
        }

        $start->add(new DateInterval('P1D'));
    }

    return $count;
}

$days = countBusinessDays($naow, $last);

?><!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8" />
    <title>TPAN</title>
    <style>
html,
body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    font-family: sans-serif;
}

body {
    position: relative;
    background: url('https://s-media-cache-ak0.pinimg.com/originals/69/36/60/693660ec438a3403b21cdaa0b68e78e9.jpg') no-repeat center center;
    background-size: cover;
    font-size: 2em;
}

.hero {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    width: 500px;
    height: 400px;
    margin: auto;
    background-color: rgba(255, 255, 255, 0.75);
    text-align: center;
}

.counter {
    font-size: 5em;
    margin: 0.1em 0;
}

@keyframes colorz {
    0% { color: red; }
    16% { color: orange; }
    32% { color: yellow; }
    50% { color: green; }
    66% { color: cornflowerblue; }
    82% { color: purple; }
    100% { color: magenta; }
}

.today {
    line-height: 400px;
    margin: 0;
    font-size: 5em;
    animation: colorz 1s infinite alternate;
}
    </style>
</head>

<body>
    <div class="hero">
<?php if (0 >= $days) { ?>
        <p class="today">\o/</p>
<?php } else { ?>
        <p>Hang in there! Only</p>
        <p class="counter"><?= $days ?></p>
        <p>day<?= $days > 1 ? 's' : '' ?> left!</p>
<?php } ?>
    </div>
</body>

</html>
	<?php

	$naow = new DateTime(date('Y-m-d').' 00:00:00');
	$last = new DateTime('2017-09-08 00:00:00'); // date of last working day

	/**
	* @param DateTime $date
	*
	* @return bool
	*/
	function isBusinessDay(DateTime $date)
	{
	if (in_array(
	$date->format('Y-m-d'),
	// exclude holidays
	[
	'2017-07-14',
	'2017-08-15'
	]
	)) {
	return false;
	}

	return $date->format('N') < 6;
	}

	function countBusinessDays(DateTime $start, DateTime $end)
	{
	$count = 0;

	while (intval($start->format('Ymd')) <= intval($end->format('Ymd'))) {
	if (isBusinessDay($start)) {
	$count++;
	}

	$start->add(new DateInterval('P1D'));
	}

	return $count;
	}

	$days = countBusinessDays($naow, $last);

	?><!DOCTYPE html>
	<html>

	<head>
	<meta charset="utf-8" />
	<title>TPAN</title>
	<style>
	html,
	body {
	width: 100%;
	height: 100%;
	margin: 0;
	padding: 0;
	font-family: sans-serif;
	}

	body {
	position: relative;
	background: url('https://s-media-cache-ak0.pinimg.com/originals/69/36/60/693660ec438a3403b21cdaa0b68e78e9.jpg') no-repeat center center;
	background-size: cover;
	font-size: 2em;
	}

	.hero {
	position: absolute;
	top: 0;
	right: 0;
	bottom: 0;
	left: 0;
	width: 500px;
	height: 400px;
	margin: auto;
	background-color: rgba(255, 255, 255, 0.75);
	text-align: center;
	}

	.counter {
	font-size: 5em;
	margin: 0.1em 0;
	}

	@keyframes colorz {
	0% { color: red; }
	16% { color: orange; }
	32% { color: yellow; }
	50% { color: green; }
	66% { color: cornflowerblue; }
	82% { color: purple; }
	100% { color: magenta; }
	}

	.today {
	line-height: 400px;
	margin: 0;
	font-size: 5em;
	animation: colorz 1s infinite alternate;
	}
	</style>
	</head>

	<body>
	<div class="hero">
	<?php if (0 >= $days) { ?>
	<p class="today">\o/</p>
	<?php } else { ?>
	<p>Hang in there! Only</p>
	<p class="counter"><?= $days ?></p>
	<p>day<?= $days > 1 ? 's' : '' ?> left!</p>
	<?php } ?>
	</div>
	</body>

	</html>