Remove seconds from a clock - javascript

I have been trying to do some research on how to do this but still no luck. Basically, I have a clock on a 12 hour format that shows automatically on page load. What I'm trying to do here is that how will I be able to change the clock format to 24 hour by using an AddEventLister? Would also like to add another AddEventListener that removes the seconds from it. Here's my code
function myClock() {
let date = new Date();
let hh = date.getHours();
let mm = date.getMinutes();
let ss = date.getSeconds();
let session = "AM";
if(hh == 0){
hh = 12;
}
if(hh > 12){
hh = hh - 12;
session = "PM";
}
hh = (hh < 10) ? "0" + hh : hh;
mm = (mm < 10) ? "0" + mm : mm;
ss = (ss < 10) ? "0" + ss : ss;
let time = hh + ":" + mm + ":" + ss + " " + session;
document.getElementById("time-now").innerText = time;
var t = setTimeout(function(){myClock()}, 1000);
}
myClock();
<span id="time-now"></span>

Here's the logic compressed (and edge-case tested) using .toLocaleTimeString(). With it, you can specify a locale and several formatting options, including 24-hour clock....
function myClock(locale) {
const date = new Date();
const time = date.toLocaleTimeString(locale, { hour12: false })
document.getElementById("time-now").innerText = time;
setTimeout(() => myClock(locale), 1000);
}
// US just for example
myClock('en-US');
<span id="time-now"></span>

const myClock=(locale)=> {
const date = new Date();
const time = date.toLocaleTimeString(locale, { hour12: false
})
document.getElementById("time-now").innerText = time;
setTimeout(() => myClock(locale), 1000);
}
// US just for example
myClock('en-US');

Related

Increment of minute goes to 60 min not 00

I am trying to show the next whole minute in a clock. When I increment the min with min++ the display shows 60 mins then changes the hour 1 second later.
How do I change it?
function getClockTime_2() {
let date = new Date();
let hr = date.getHours();
let min = date.getMinutes();
min++ // causes the min to go to 60 and change the hour one second later.
hr = ("0" + hr).slice(-2);
min = ("0" + min).slice(-2);
let clock24 = document.getElementById("clockDiv2");
clock24.innerHTML = `${hr}:${min}:00`;
}
setInterval(getClockTime_2, 1000);
Use setMinutes of Date.
You can increase it before get minute instead of increase manual.
function getClockTime_2() {
let date = new Date();
date.setMinutes(date.getMinutes() + 1)
let hr = date.getHours();
let min = date.getMinutes();
hr = ("0" + hr).slice(-2);
min = ("0" + min).slice(-2);
let clock24 = document.getElementById("clockDiv2");
clock24.innerHTML = `${hr}:${min}:00`;
}
<div id="clockDiv2">00:00:00</div>
<button onclick="getClockTime_2()">Click me</button>
//Get the current time
function getTime() {
let todaDate = new Date();
todaDate.setMinutes(todaDate.getMinutes() + 1);
let hour = todaDate.getHours();
let minute = todaDate.getMinutes();
let second = todaDate.getSeconds();
hour = ("0" + hour).slice(-2);
minute = ("0" + minute).slice(-2);
second = ("0" + second).slice(-2);
let clock = hour + ":" + minute + ":" + second;
return clock;
}
//Set current time in HTML before call setInterval method.
function clockTime() {
str = getTime();
document.getElementById("clockDiv2").innerHTML = str;
}
function refreshTime() {
str = getTime();
document.getElementById("clockDiv2").innerHTML = str;
}
setInterval(refreshTime, 1000);
clockTime();

Add "am" or "pm" to Specific Time Format Dependent on Time of Day - Javascript

I have the following javaScript which is showing the time in hours and minutes.
Is there a way of having an "am" or "pm" next to the time, dependent on whether it's before or after midday?
var t = new Date();
var time = document.getElementById("time");
time.textContent = t.getHours() + ":" + t.getMinutes();
<h3 class="time-holder">Current UK time: <span id="time">12:00</span></h3>
Answer adapted from here.
var d = new Date();
var hr = d.getHours();
var min = d.getMinutes();
if (min < 10) {
min = "0" + min;
}
var ampm = "am";
if( hr > 12 ) {
hr -= 12;
ampm = "pm";
}
var time = document.getElementById("time");
time.textContent = hr + ":" + min + ampm;
<h3 class="time-holder">Current UK time: <span id="time">12:00</span></h3>
use the "toLocaleTimeString()" method instead of the "getHours()" and "getMinutes()"
for example:
var t = new Date();
var time = document.getElementById("time");
time.textContent = t.toLocaleTimeString('en-US');
source:
https://www.w3schools.com/jsref/jsref_tolocaletimestring.asp

Why does the date not adjust to the time set by UTC?

When printing the time for the clocks, a similar code works and adjusts for the timezone selected, but this does not work for printing the date. Any idea why?
It just displays the UTC default time.
<script>
function cetDT(){
var now = new Date();
var today = new Date(now.getUTCFullYear(), now.getUTCMonth(), now.getUTCDate(), now.getUTCHours(), now.getUTCMinutes(), now.getUTCSeconds());
var day = today.getDate();
var month = today.getMonth();
var year = today.getFullYear();
var anHour = 1000 * 60 * 60;
today = new Date(today.getTime() - anHour * -2);
var hours = today.getHours();
var minutes = today.getMinutes();
var seconds = today.getSeconds();
if (hours >= 12){
meridiem = "";
}
else {
meridiem = "";
}
if (minutes<10){
minutes = "0" + minutes;
}
else {
minutes = minutes;
}
if (seconds<10){
seconds = "0" + seconds;
}
else {
seconds = seconds;
}
document.getElementById("cetDT").innerHTML = (day + '/' + (parseFloat (month) + 1) + '/' + year);
}
cetDT();
</script>
You're using now.getUTCDate(), now.getUTCHours() and similar, which will grab the current date and time in UTC.
To get the local equivalent, you're looking for now.getDate(), now.getHours() etc. Note the lack of 'UTC' in the names.
Note that even though you're updating the today variable with today = new Date(today.getTime() - anHour * -2), today is initialed earlier with the UTC times. Thus, getTime() will be relative to UTC.
To resolve this, all you need to do is swap out the UTC times:
function cetDT() {
var now = new Date();
var today = new Date(now.getFullYear(), now.getMonth(), now.getDate(), now.getHours(), now.getMinutes(), now.getSeconds());
var day = today.getDate();
var month = today.getMonth();
var year = today.getFullYear();
var anHour = 1000 * 60 * 60;
today = new Date(today.getTime() - anHour * -2);
var hours = today.getHours();
var minutes = today.getMinutes();
var seconds = today.getSeconds();
if (hours >= 12) {
meridiem = "";
} else {
meridiem = "";
}
if (minutes < 10) {
minutes = "0" + minutes;
} else {
minutes = minutes;
}
if (seconds < 10) {
seconds = "0" + seconds;
} else {
seconds = seconds;
}
document.getElementById("cetDT").innerHTML = (day + '/' + (parseFloat(month) + 1) + '/' + year);
}
cetDT();
Note that there's also several bits of code that are completely redundant, such as else { seconds = seconds; }. You may wish to look into refactoring this code ;)
Hope this helps! :)

How to convert the time from ''hh:mm:ss' format to an 'Hourly' format using jquery/JS [duplicate]

How do you display a JavaScript datetime object in the 12 hour format (AM/PM)?
function formatAMPM(date) {
var hours = date.getHours();
var minutes = date.getMinutes();
var ampm = hours >= 12 ? 'pm' : 'am';
hours = hours % 12;
hours = hours ? hours : 12; // the hour '0' should be '12'
minutes = minutes < 10 ? '0'+minutes : minutes;
var strTime = hours + ':' + minutes + ' ' + ampm;
return strTime;
}
console.log(formatAMPM(new Date));
If you just want to show the hours then..
var time = new Date();
console.log(
time.toLocaleString('en-US', { hour: 'numeric', hour12: true })
);
Output : 7 AM
If you wish to show the minutes as well then...
var time = new Date();
console.log(
time.toLocaleString('en-US', { hour: 'numeric', minute: 'numeric', hour12: true })
);
Output : 7:23 AM
Here's a way using regex:
console.log(new Date('7/10/2013 20:12:34').toLocaleTimeString().replace(/([\d]+:[\d]{2})(:[\d]{2})(.*)/, "$1$3"))
console.log(new Date('7/10/2013 01:12:34').toLocaleTimeString().replace(/([\d]+:[\d]{2})(:[\d]{2})(.*)/, "$1$3"))
This creates 3 matching groups:
([\d]+:[\d]{2}) - Hour:Minute
(:[\d]{2}) - Seconds
(.*) - the space and period (Period is the official name for AM/PM)
Then it displays the 1st and 3rd groups.
WARNING: toLocaleTimeString() may behave differently based on region / location.
If you don't need to print the am/pm, I found the following nice and concise:
var now = new Date();
var hours = now.getHours() % 12 || 12; // 12h instead of 24h, with 12 instead of 0.
This is based off #bbrame's answer.
As far as I know, the best way to achieve that without extensions and complex coding is like this:
date.toLocaleString([], { hour12: true});
Javascript AM/PM Format
<!DOCTYPE html>
<html>
<body>
<p>Click the button to display the date and time as a string.</p>
<button onclick="myFunction()">Try it</button>
<button onclick="fullDateTime()">Try it2</button>
<p id="demo"></p>
<p id="demo2"></p>
<script>
function myFunction() {
var d = new Date();
var n = d.toLocaleString([], { hour: '2-digit', minute: '2-digit' });
document.getElementById("demo").innerHTML = n;
}
function fullDateTime() {
var d = new Date();
var n = d.toLocaleString([], { hour12: true});
document.getElementById("demo2").innerHTML = n;
}
</script>
</body>
</html>
I found this checking this question out.
How do I use .toLocaleTimeString() without displaying seconds?
In modern browsers, use Intl.DateTimeFormat and force 12hr format with options:
let now = new Date();
new Intl.DateTimeFormat('default',
{
hour12: true,
hour: 'numeric',
minute: 'numeric'
}).format(now);
// 6:30 AM
Using default will honor browser's default locale if you add more options, yet will still output 12hr format.
Use Moment.js for this
Use below codes in JavaScript when using moment.js
H, HH 24 hour time
h, or hh 12 hour time (use in conjunction with a or A)
The format() method returns the date in specific format.
moment(new Date()).format("YYYY-MM-DD HH:mm"); // 24H clock
moment(new Date()).format("YYYY-MM-DD hh:mm A"); // 12H clock (AM/PM)
moment(new Date()).format("YYYY-MM-DD hh:mm a"); // 12H clock (am/pm)
My suggestion is use moment js for date and time operation.
https://momentjs.com/docs/#/displaying/format/
console.log(moment().format('hh:mm a'));
<script src="//cdnjs.cloudflare.com/ajax/libs/moment.js/2.17.1/moment.min.js"></script>
Updated for more compression
const formatAMPM = (date) => {
let hours = date.getHours();
let minutes = date.getMinutes();
const ampm = hours >= 12 ? 'pm' : 'am';
hours %= 12;
hours = hours || 12;
minutes = minutes < 10 ? `0${minutes}` : minutes;
const strTime = `${hours}:${minutes} ${ampm}`;
return strTime;
};
console.log(formatAMPM(new Date()));
use dateObj.toLocaleString([locales[, options]])
Option 1 - Using locales
var date = new Date();
console.log(date.toLocaleString('en-US'));
Option 2 - Using options
var options = { hour12: true };
console.log(date.toLocaleString('en-GB', options));
Note: supported on all browsers but safari atm
Short RegExp for en-US:
var d = new Date();
d = d.toLocaleTimeString().replace(/:\d+ /, ' '); // current time, e.g. "1:54 PM"
Please find the solution below
var d = new Date();
var amOrPm = (d.getHours() < 12) ? "AM" : "PM";
var hour = (d.getHours() < 12) ? d.getHours() : d.getHours() - 12;
return d.getDate() + ' / ' + d.getMonth() + ' / ' + d.getFullYear() + ' ' + hour + ':' + d.getMinutes() + ' ' + amOrPm;
It will return the following format like
09:56 AM
appending zero in start for the hours as well if it is less than 10
Here it is using ES6 syntax
const getTimeAMPMFormat = (date) => {
let hours = date.getHours();
let minutes = date.getMinutes();
const ampm = hours >= 12 ? 'PM' : 'AM';
hours = hours % 12;
hours = hours ? hours : 12; // the hour '0' should be '12'
hours = hours < 10 ? '0' + hours : hours;
// appending zero in the start if hours less than 10
minutes = minutes < 10 ? '0' + minutes : minutes;
return hours + ':' + minutes + ' ' + ampm;
};
console.log(getTimeAMPMFormat(new Date)); // 09:59 AM
I fount it's here it working fine.
var date_format = '12'; /* FORMAT CAN BE 12 hour (12) OR 24 hour (24)*/
var d = new Date();
var hour = d.getHours(); /* Returns the hour (from 0-23) */
var minutes = d.getMinutes(); /* Returns the minutes (from 0-59) */
var result = hour;
var ext = '';
if(date_format == '12'){
if(hour > 12){
ext = 'PM';
hour = (hour - 12);
result = hour;
if(hour < 10){
result = "0" + hour;
}else if(hour == 12){
hour = "00";
ext = 'AM';
}
}
else if(hour < 12){
result = ((hour < 10) ? "0" + hour : hour);
ext = 'AM';
}else if(hour == 12){
ext = 'PM';
}
}
if(minutes < 10){
minutes = "0" + minutes;
}
result = result + ":" + minutes + ' ' + ext;
console.log(result);
and plunker example here
Check out Datejs. Their built in formatters can do this: http://code.google.com/p/datejs/wiki/APIDocumentation#toString
It's a really handy library, especially if you are planning on doing other things with date objects.
<script>
var todayDate = new Date();
var getTodayDate = todayDate.getDate();
var getTodayMonth = todayDate.getMonth()+1;
var getTodayFullYear = todayDate.getFullYear();
var getCurrentHours = todayDate.getHours();
var getCurrentMinutes = todayDate.getMinutes();
var getCurrentAmPm = getCurrentHours >= 12 ? 'PM' : 'AM';
getCurrentHours = getCurrentHours % 12;
getCurrentHours = getCurrentHours ? getCurrentHours : 12;
getCurrentMinutes = getCurrentMinutes < 10 ? '0'+getCurrentMinutes : getCurrentMinutes;
var getCurrentDateTime = getTodayDate + '-' + getTodayMonth + '-' + getTodayFullYear + ' ' + getCurrentHours + ':' + getCurrentMinutes + ' ' + getCurrentAmPm;
alert(getCurrentDateTime);
</script>
Hopefully this answer is a little more readable than the other answers (especially for new comers).
Here's the solution I've implemented in some of my sites for informing the last time the site code was modified. It implements AM/PM time through the options parameter of date.toLocaleDateString (see related Mozilla documentation).
// Last time page code was updated/changed
const options = {
year: "numeric",
month: "long",
weekday: "long",
day: "numeric",
hour: "numeric",
minute: "numeric",
second: "numeric",
hour12: true // This is the line of code we care about here
/*
false: displays 24hs format for time
true: displays 12, AM and PM format
*/
};
let last = document.lastModified;
let date = new Date(last);
let local = date.toLocaleDateString("en-US", options);
let fullDate = `${local}`;
document.getElementById("updated").textContent = fullDate;
Which output is in the format:
Saturday, May 28, 2022, 8:38:50 PM
This output is then displayed in the following HTML code:
<p>Last update: <span id="updated">_update_date_goes_here</span></p>
NOTE: In this use case, document.lastModified has some weird behaviors depending if it's run locally or on a external server (see this Stack Overflow question). Though it works correctly when I run it in my GitHub page (you should see it in action in the site at the footer).
Here is another way that is simple, and very effective:
var d = new Date();
var weekday = new Array(7);
weekday[0] = "Sunday";
weekday[1] = "Monday";
weekday[2] = "Tuesday";
weekday[3] = "Wednesday";
weekday[4] = "Thursday";
weekday[5] = "Friday";
weekday[6] = "Saturday";
var month = new Array(11);
month[0] = "January";
month[1] = "February";
month[2] = "March";
month[3] = "April";
month[4] = "May";
month[5] = "June";
month[6] = "July";
month[7] = "August";
month[8] = "September";
month[9] = "October";
month[10] = "November";
month[11] = "December";
var t = d.toLocaleTimeString().replace(/:\d+ /, ' ');
document.write(weekday[d.getDay()] + ',' + " " + month[d.getMonth()] + " " + d.getDate() + ',' + " " + d.getFullYear() + '<br>' + d.toLocaleTimeString());
</script></div><!-- #time -->
you can determine am or pm with this simple code
var today=new Date();
var noon=new Date(today.getFullYear(),today.getMonth(),today.getDate(),12,0,0);
var ampm = (today.getTime()<noon.getTime())?'am':'pm';
try this
var date = new Date();
var hours = date.getHours();
var minutes = date.getMinutes();
var seconds = date.getSeconds();
var ampm = hours >= 12 ? "pm" : "am";
function formatTime( d = new Date(), ampm = true )
{
var hour = d.getHours();
if ( ampm )
{
var a = ( hour >= 12 ) ? 'PM' : 'AM';
hour = hour % 12;
hour = hour ? hour : 12; // the hour '0' should be '12'
}
var hour = checkDigit(hour);
var minute = checkDigit(d.getMinutes());
var second = checkDigit(d.getSeconds());
// https://stackoverflow.com/questions/1408289/how-can-i-do-string-interpolation-in-javascript
return ( ampm ) ? `${hour}:${minute}:${second} ${a}` : `${hour}:${minute}:${second}`;
}
function checkDigit(t)
{
return ( t < 10 ) ? `0${t}` : t;
}
document.querySelector("#time1").innerHTML = formatTime();
document.querySelector("#time2").innerHTML = formatTime( new Date(), false );
<p>ampm true: <span id="time1"></span> (default)</p>
<p>ampm false: <span id="time2"></span></p>
function startTime() {
const today = new Date();
let h = today.getHours();
let m = today.getMinutes();
let s = today.getSeconds();
var meridian = h >= 12 ? "PM" : "AM";
h = h % 12;
h = h ? h : 12;
m = m < 10 ? "0" + m : m;
s = s < 10 ? "0" + s : s;
var strTime = h + ":" + m + ":" + s + " " + meridian;
document.getElementById('time').innerText = strTime;
setTimeout(startTime, 1000);
}
startTime();
<h1 id='time'></h1>
If you have time as string like so var myTime = "15:30",
then you can use the following code to get am pm.
var hour = parseInt(myTime.split(":")[0]) % 12;
var timeInAmPm = (hour == 0 ? "12": hour ) + ":" + myTime.split(":")[1] + " " + (parseInt(parseInt(myTime.split(":")[0]) / 12) < 1 ? "am" : "pm");
var d = new Date();
var hours = d.getHours() % 12;
hours = hours ? hours : 12;
var test = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'][(d.getMonth() + 1)] + " " +
("00" + d.getDate()).slice(-2) + " " +
d.getFullYear() + " " +
("00" + hours).slice(-2) + ":" +
("00" + d.getMinutes()).slice(-2) + ":" +
("00" + d.getSeconds()).slice(-2) + ' ' + (d.getHours() >= 12 ? 'PM' : 'AM');
document.getElementById("demo").innerHTML = test;
<p id="demo" ></p>
<h1 id="clock_display" class="text-center" style="font-size:40px; color:#ffffff">[CLOCK TIME DISPLAYS HERE]</h1>
<script>
var AM_or_PM = "AM";
function startTime(){
var today = new Date();
var h = today.getHours();
var m = today.getMinutes();
var s = today.getSeconds();
h = twelve_hour_time(h);
m = checkTime(m);
s = checkTime(s);
document.getElementById('clock_display').innerHTML =
h + ":" + m + ":" + s +" "+AM_or_PM;
var t = setTimeout(startTime, 1000);
}
function checkTime(i){
if(i < 10){
i = "0" + i;// add zero in front of numbers < 10
}
return i;
}
// CONVERT TO 12 HOUR TIME. SET AM OR PM
function twelve_hour_time(h){
if(h > 12){
h = h - 12;
AM_or_PM = " PM";
}
return h;
}
startTime();
</script>
function getDateTime() {
var now = new Date();
var year = now.getFullYear();
var month = now.getMonth() + 1;
var day = now.getDate();
if (month.toString().length == 1) {
month = '0' + month;
}
if (day.toString().length == 1) {
day = '0' + day;
}
var hours = now.getHours();
var minutes = now.getMinutes();
var ampm = hours >= 12 ? 'pm' : 'am';
hours = hours % 12;
hours = hours ? hours : 12;
minutes = minutes < 10 ? '0' + minutes : minutes;
var timewithampm = hours + ':' + minutes + ' ' + ampm;
var dateTime = monthNames[parseInt(month) - 1] + ' ' + day + ' ' + year + ' ' + timewithampm;
return dateTime;
}
Here my solution
function getTime() {
var systemDate = new Date();
var hours = systemDate.getHours();
var minutes = systemDate.getMinutes();
var strampm;
if (hours >= 12) {
strampm= "PM";
} else {
strampm= "AM";
}
hours = hours % 12;
if (hours == 0) {
hours = 12;
}
_hours = checkTimeAddZero(hours);
_minutes = checkTimeAddZero(minutes);
console.log(_hours + ":" + _minutes + " " + strampm);
}
function checkTimeAddZero(i) {
if (i < 10) {
i = "0" + i
}
return i;
}
const formatAMPM = (date) => {
try {
let time = date.split(" ");
let hours = time[4].split(":")[0];
let minutes = time[4].split(":")[1];
hours = hours || 12;
const ampm = hours >= 12 ? " PM" : " AM";
minutes = minutes < 10 ? `${minutes}` : minutes;
hours %= 12;
const strTime = `${hours}:${minutes} ${ampm}`;
return strTime;
} catch (e) {
return "";
}
};
const startTime = "2021-12-07T17:00:00.073Z"
formatAMPM(new Date(startTime).toUTCString())
This is the easiest Way you can Achieve this using ternary operator or you can also use if else instead !
const d = new Date();
let hrs = d.getHours();
let m = d.getMinutes();
// Condition to add zero before minute
let min = m < 10 ? `0${m}` : m;
const currTime = hrs >= 12 ? `${hrs - 12}:${min} pm` : `${hrs}:${min} am`;
console.log(currTime);
Or just simply do the following code:
<script>
time = function() {
var today = new Date();
var h = today.getHours();
var m = today.getMinutes();
var s = today.getSeconds();
m = checkTime(m);
s = checkTime(s);
document.getElementById('txt_clock').innerHTML = h + ":" + m + ":" + s;
var t = setTimeout(function(){time()}, 0);
}
time2 = function() {
var today = new Date();
var h = today.getHours();
var m = today.getMinutes();
var s = today.getSeconds();
m = checkTime(m);
s = checkTime(s);
if (h>12) {
document.getElementById('txt_clock_stan').innerHTML = h-12 + ":" + m + ":" + s;
}
var t = setTimeout(function(){time2()}, 0);
}
time3 = function() {
var today = new Date();
var h = today.getHours();
var m = today.getMinutes();
var s = today.getSeconds();
if (h>12) {
document.getElementById('hour_line').style.width = h-12 + 'em';
}
document.getElementById('minute_line').style.width = m + 'em';
document.getElementById('second_line').style.width = s + 'em';
var t = setTimeout(function(){time3()}, 0);
}
checkTime = function(i) {
if (i<10) {i = "0" + i}; // add zero in front of numbers < 10
return i;
}
</script>

Clock and date javascript

Im creating a JS clock/date. I previously got the time to work perfectly then I decided to add more onto my clock (date). Right now I cant figure why it isn't working. If anyone could give me tip or idea how to fix it, I would greatly appreciate it.
function timedate()
{
var currentTime = new Date();
var hours = currentTime.getHours();
var minutes = currentTime.getMinutes();
var dn="PM"
var d = currentTime.getDate(); <--
var day = (d < 10) ? '0' + d : d;
var m = currentTime.getMonth() + 1; <--
var month = (m < 10) ? '0' + m : m;
var yy = currentTime.getYear(); <--
var year = (yy < 1000) ? yy + 1900 : yy;
if (hours<12)
{
dn="AM"
}
if (hours>12)
{
hours=hours-12
}
if (hours==0)
{
hours=12
}
if (minutes<=9)
{
minutes="0"+minutes
}
var clocklocation = document.getElementById('timedate');
clocklocation.innerHTML = "" +hours+":"+minutes+dn+""+day + "/" + month + "/" + year;
setTimeout("timedate()", 1000);
}
timedate();
Your code works, it is just not visible because you do not have seconds showing
Also change
setTimeout("timedate()", 1000);
to
setTimeout(timedate, 1000);
because it is not recommended
and remove the <--
Make sure it runs onload or after the tag you want to show it in
Alternatively remove the line and change
timedate();
to
setInterval(timedate,1000)
const pad = num => ("0" + num).slice(-2);
const timedate = () => {
const currentTime = new Date();
let hours = currentTime.getHours();
const minutes = pad(currentTime.getMinutes());
const seconds = pad(currentTime.getSeconds());
const d = currentTime.getDate();
const day = pad(d);
const month = pad(currentTime.getMonth() + 1);
const yy = currentTime.getFullYear();
let dn = "PM"
if (hours <= 12) dn = "AM";
if (hours >= 12) hours -= 12;
if (hours == 0) hours = 12;
hours = pad(hours);
document.getElementById('timedate').innerHTML = "" +
hours + ":" +
minutes + ":" +
seconds + dn + " " +
day + "/" + month + "/" + yy;
}
window.addEventListener("load", function() {
setInterval(timedate, 1000);
});
<span id="timedate"></span>
If you set the timeout with setTimeout(timedate, 1000) instead of your current magic string version, it works1.
1 I took the liberty of adding seconds to your code as well, to make it obvious that the clock updates. Of course, you also need to remove <-- from your code.

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