Develop Reference

How do I display the date/time for Australia in PHP?

I have this countdown timer that I'm trying to make, but I need to current the current time/date in Australia.
"Clearance Date" is the date I'd like to count down to.
At the moment I'm getting 10d 7h 0m 8s but I believe it should be 9d 21hr
<?php
$clearance_date = 'August 20, 2022 09:00:00';
?>
<p id="demo"></p>
<script>
// Set the date we're counting down to
// 1. JavaScript
// var countDownDate = new Date("Sep 5, 2018 15:37:25").getTime();
// 2. PHP
var countDownDate = <?php echo strtotime($clearance_date) ?> * 1000;
var now = <?php echo time() ?> * 1000;
// Update the count down every 1 second
var x = setInterval(function() {
// Get todays date and time
now = now + 1000;
// Find the distance between now an the count down date
var distance = countDownDate - now;
// Time calculations for days, hours, minutes and seconds
var days = Math.floor(distance / (1000 * 60 * 60 * 24));
var hours = Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
var minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
var seconds = Math.floor((distance % (1000 * 60)) / 1000);
// Output the result in an element with id="demo"
document.getElementById("demo").innerHTML = days + "d " + hours + "h " +
minutes + "m " + seconds + "s ";
// If the count down is over, write some text
if (distance < 0) {
clearInterval(x);
document.getElementById("demo").innerHTML = "EXPIRED";
}
}, 1000);
</script>

Using PHP to set the date uses the server time. Whereas using now in javascript get the client time.
I would pass the duration (hours left) from PHP to set the javascript variable. And then count that down and add to current date.

How to add a specific timezone to a countdown timer

The goal is to have the countdown timer to count down to a specific time in NYC (EST).
So the the timer goes to zero at 12:00 in NYC but in LA it would go to zero at 09:00
This is the code I use from W3Schools. But I don't have enough knowledge to add the timezone.
Can anyone help please :)
<script>
// Set the date we're counting down to
var countDownDate = new Date("Dec, 2019 12:00:00 GMT-0500").getTime();
// Update the count down every 1 second
var x = setInterval(function() {
// Get today's date and time
var now = new Date().getTime();
// Find the distance between now and the count down date
var distance = countDownDate - now;
// Time calculations for days, hours, minutes and seconds
var hours = Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
var minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
var seconds = Math.floor((distance % (1000 * 60)) / 1000);
// Output the result in an element with id="demo"
document.getElementById("demo").innerHTML = hours + "h "
+ minutes + "m " + seconds + "s ";
// If the count down is over, write some text
if (distance < 0) {
clearInterval(x);
document.getElementById("demo").innerHTML = "EXPIRED";
}
}, 1000);
</script>

Custom field calculation in wordpress using Javascript

I have implemented the code below in my site, to display a running timer. The site is running on Wordpress. At the moment the date is input in the code (so it applied site wide). I am looking to have a running timer on each post.
I need to change the code below so that I can use a custom field on each post called "expiry" as the date, instead of the hardwired date below (newDate("Jan 5, 2021 15:37:25).getTime()
<!-- Display the countdown timer in an element -->
<p id="demo"></p>
<script>
// Set the date we're counting down to
var countDownDate = new Date("Jan 5, 2021 15:37:25").getTime();
// Update the count down every 1 second
var x = setInterval(function() {
// Get today's date and time
var now = new Date().getTime();
// Find the distance between now and the count down date
var distance = countDownDate - now;
// Time calculations for days, hours, minutes and seconds
var days = Math.floor(distance / (1000 * 60 * 60 * 24));
var hours = Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
var minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
var seconds = Math.floor((distance % (1000 * 60)) / 1000);
// Display the result in the element with id="demo"
document.getElementById("demo").innerHTML = days + "d " + hours + "h "
+ minutes + "m " + seconds + "s ";
// If the count down is finished, write some text
if (distance < 0) {
clearInterval(x);
document.getElementById("demo").innerHTML = "EXPIRED";
}
}, 1000);
</script>
The above code is sourced from here
My site is here
Thanks in advance

below steps is your requirements:
1) in custom field expiry set return format as custom "F j, Y g:i:s"
example link (https://prnt.sc/pqg79l)
2) add this function in functions.php
function functionname() {
global $post;
$field= get_field('expiry_date', $post->ID);
echo '<input type="hidden" id="date" value="'.$field.'">';
}
add_action( 'template_redirect', 'functionname' );
3) in your js file add below script
var $= jQuery;
var d = $("#date").val();
console.log(d);
// Set the date we're counting down to
var countDownDate = new Date(d).getTime();
// Update the count down every 1 second
var x = setInterval(function() {
// Get today's date and time
var now = new Date().getTime();
// Find the distance between now and the count down date
var distance = countDownDate - now;
// Time calculations for days, hours, minutes and seconds
var days = Math.floor(distance / (1000 * 60 * 60 * 24));
var hours = Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
var minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
var seconds = Math.floor((distance % (1000 * 60)) / 1000);
// Display the result in the element with id="demo"
document.getElementById("demo").innerHTML = days + "d " + hours + "h "
+ minutes + "m " + seconds + "s ";
// If the count down is finished, write some text
if (distance < 0) {
clearInterval(x);
document.getElementById("demo").innerHTML = "EXPIRED";
}
}, 1000);
make sure you have to add <p id="demo"></p> where you want to show in post
I have tried this code..It's totally working fine..I hope i have helped you by this

How to display this code as D/HH/MM/SS?

This code basically puts out a countdown. The problem is, i would like it to be put out as D/HH/MM/SS as for example 1 day 05 hours 20 minutes 02 seconds, but i'm pretty new to coding, so i wonder if somebody could show/help me what is the right way to do it.
Thanks in advance!
Blockquote
<p id="demo"></p>
<script>
// Set the date we're counting down to
var countDownDate = new Date("Sep 5, 2018 15:37:25").getTime();
// Update the count down every 1 second
var x = setInterval(function() {
// Get todays date and time
var now = new Date().getTime();
// Find the distance between now an the count down date
var distance = countDownDate - now;
// Time calculations for days, hours, minutes and seconds
var days = Math.floor(distance / (1000 * 60 * 60 * 24));
var hours = Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
var minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
var seconds = Math.floor((distance % (1000 * 60)) / 1000);
// Display the result in the element with id="demo"
document.getElementById("demo").innerHTML = days + "d " + hours + "h "
+ minutes + "m " + seconds + "s ";
// If the count down is finished, write some text
if (distance < 0) {
clearInterval(x);
document.getElementById("demo").innerHTML = "EXPIRED";
}
}, 1000);
</script>

Sorry, I did not read your answer carefully enough the 1st time.
Details here about padStart
a new language feature and an old work around (repeated below).
function pad(num, size) {
//num, string to be padded with leading zeros
//size, size of result after padding
//pads up to 10 characters
var s = "000000000" + num;
return s.substr(s.length-size);
}
var test='1';
console.log(pad('123456789',10)); //pads up to 10 char, result '0123456789'
console.log(pad(test,2)); //pads up to 2 char, result '01'

Set Countdown timer then display voting open then after voting period display voting ends

Here are my code on my current program. I have a running code for countdown timer my problem now is when the VOTING PERIOD ENDS I want to display Voting Ends instead of it always displaying voting open.
<script>
// Set the date we're counting down to
var countDownDate = new Date("<?php echo $countdown['datestart']; ?>").getTime();
var endDate = new date("<?php echo $countdown['dateend']; ?>").getTime();
// Update the count down every 1 second
var x = setInterval(function() {
// Get todays date and time
var now = new Date().getTime();
// Find the distance between now an the count down date
var distance = countDownDate - now;
// Time calculations for days, hours, minutes and seconds
var days = Math.floor(distance / (1000 * 60 * 60 * 24));
var hours = Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
var minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
var seconds = Math.floor((distance % (1000 * 60)) / 1000);
// Output the result in an element with id="demo"
document.getElementById("demo").innerHTML = days + "d " + hours + "h "
+ minutes + "m " + seconds + "s ";
// If the count down is over, write some text
if (distance < 0) {
clearInterval(x);
document.getElementById("demo").innerHTML = "Voting now Opens";
}
// If date end is over display some text
//display voting period ends
}, 1000);
</script>

At a glance, i can see that your "endDate" line has an error:
var endDate = new date(.....
it should be Date with a capital 'D' as is for the var countDownDate i.e.
var endDate = new Date(.....
Assuming the rest of the code is correct (and it seems ok) - should be fine.
If that doesn't solve it - from your question it is easy to decipher that the if the following function always resolves to false and hence will never fire enclosed code which clears the 'x' interval and shows that voting is open.
if (distance < 0) {...}
If what I would do is console.log(countDownDate);, console.log(now); and why not also console.log(distance); ideally immidiately after the declaration:
// Find the distance between now an the count down date
var distance = countDownDate - now;
if you are unsure how to use the console.log() function please refer to the following link: https://developers.google.com/web/tools/chrome-devtools/console/

To add the end voting message, you will need to continue the interval until the voting has ended. To make things a little simpler, we have split the code into 3 sections using if...else if...else. In each of these, we handle the respective display for that scenario. It has the added benefit of not doing calculations when it is not needed.
If distance > 0, the voting has not started.
If endDate > now, the voting hasn't ended. I am assuming that the PHP output will result in an accurate date for this scenario. Read more.
Any other scenario means voting has ended.
<script>
// Set the date we're counting down to
var countDownDate = new Date("<?php echo $countdown['datestart']; ?>").getTime();
var endDate = new Date("<?php echo $countdown['dateend']; ?>").getTime();
// Update the count down every 1 second
var x = setInterval(function() {
// Get todays date and time
var now = new Date().getTime();
// Find the distance between now an the count down date
var distance = countDownDate - now;
if (distance > 0) {
// Time calculations for days, hours, minutes and seconds
var days = Math.floor(distance / (1000 * 60 * 60 * 24));
var hours = Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
var minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
var seconds = Math.floor((distance % (1000 * 60)) / 1000);
// Output the result in an element with id="demo"
document.getElementById("demo").innerHTML = days + "d " + hours + "h "
+ minutes + "m " + seconds + "s ";
}
else if (endDate > now) {
// If the count down is over, write some text
document.getElementById("demo").innerHTML = "Voting now Opens";
}
else {
// If date end is over display some text
//display voting period ends
document.getElementById("demo").innerHTML = "Voting Ended";
clearInterval(x);
}
}, 1000);
</script>