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24 hour countdown script that hits 00:00 every day at 11:00

I need a 24 hour countdown on my website that resets every day at 11:00 and after that starts 24 hour cycle again.
I don't need this script to control anything, I just need it to be there for visitors to see, so when they visit for example at 10:00 the will see 1 hour left on the clock and live counting down in format: Hours, Minutes, Seconds
And I need it to ignore clients time zone.
I found similar answer, but there is 1 hour window and it resets after that, I need it to reset immediately, how can I edit it to meet my requirements?
Here's what I found (this count to 21:00 then one hour window and than starts again):
var date;
var display = document.getElementById('time');
$(document).ready(function() {
getTime('GMT', function(time){
date = new Date(time);
});
});
setInterval(function() {
date = new Date(date.getTime() + 1000);
var currenthours = date.getHours();
var hours;
var minutes;
var seconds;
if (currenthours != 21){
if (currenthours < 21) {
hours = 20 - currenthours;
} else {
hours = 21 + (24 - currenthours);
}
minutes = 60 - date.getMinutes();
seconds = 60 - date.getSeconds();
if (minutes < 10) {
minutes = '0' + minutes;
}
if (seconds < 10) {
seconds = '0' + seconds;
}
display.innerHTML = hours + ':' + minutes + ':' +seconds;
} else {
display.innerHTML = 'LIVE NOW';
}
}, 1000);
function getTime(zone, success) {
var url = 'http://json-time.appspot.com/time.json?tz=' + zone,
ud = 'json' + (+new Date());
window[ud]= function(o){
success && success(new Date(o.datetime));
};
document.getElementsByTagName('head')[0].appendChild((function(){
var s = document.createElement('script');
s.type = 'text/javascript';
s.src = url + '&callback=' + ud;
return s;
})());
}

I guess that 1 hour reset is due to validating hours alone. Try the following code:
var date;
var display = document.getElementById('time');
$(document).ready(function() {
getTime('GMT', function(time){
date = new Date(time);
});
});
setInterval(function() {
date = new Date(date.getTime() + 1000);
var currenthours = date.getHours();
var currentSecs = date.getSeconds();
var hours;
var minutes;
var seconds;
if (currenthours == 23 && currentsecs == 0){
display.innerHTML = 'LIVE NOW';
} else {
if (currenthours < 23) {
hours = 22 - currenthours;
} else {
hours = 23;
}
minutes = 60 - date.getMinutes();
seconds = 60 - date.getSeconds();
if (minutes < 10) {
minutes = '0' + minutes;
}
if (seconds < 10) {
seconds = '0' + seconds;
}
display.innerHTML = hours + ':' + minutes + ':' +seconds;
}
}, 1000);

To get accurate day duration even during daylight saving time changes you should stick to date arithmetic.
function time() {
var d1 = new Date();
var d2 = Date.UTC(d1.getUTCFullYear(),
d1.getUTCMonth(),
d1.getUTCDate() + (d1.getUTCHours() < 11 ? 0 : 1),
11);
var dh = d2 - d1;
var hours = Math.floor(dh / 3600000);
var dm = dh - 3600000 * hours;
var min = Math.floor(dm / 60000);
var ds = dm - 60000 * min;
var sec = Math.floor(ds / 1000);
var dmilli = ds - 1000 * sec;
setTimeout(time, dmilli);
hours = ('0' + hours).slice(-2);
min = ('0' + min).slice(-2);
sec = ('0' + sec).slice(-2);
document.querySelector('#the-final-countdown p').innerHTML = hours + ':' + min + ':' + sec;
}
time();

Add 5 minutes to current time javascript

I am getting the current date as below:
var now = new Date();
I want to add 5 minutes to the existing time. The time is in 12 hour format. If the time is 3:46 AM, then I want to get 3:51 AM.
function DateFormat(date) {
var days = date.getDate();
var year = date.getFullYear();
var month = (date.getMonth() + 1);
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 = days + '/' + month + '/' + year + '/ ' + hours + ':' + minutes + ' ' + ampm;
// var strTime = hours + ':' + minutes + ' ' + ampm;
return strTime;
}
function OnlyTime(date) {
var days = date.getDate();
var year = date.getFullYear();
var month = (date.getMonth() + 1);
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 = days + '/' + month + '/' + year + '/ ' + hours + ':' + minutes + ' ' + ampm;
var strTime = hours + ':' + minutes + ' ' + ampm;
return strTime;
}
function convertTime(time)
{
var hours = Number(time.match(/^(\d+)/)[1]);
var minutes = Number(time.match(/:(\d+)/)[1]);
var AMPM = time.match(/\s(.*)$/)[1];
if (AMPM == "PM" && hours < 12) hours = hours + 12;
if (AMPM == "AM" && hours == 12) hours = hours - 12;
var sHours = hours.toString();
var sMinutes = minutes.toString();
if (hours < 10) sHours = "0" + sHours;
if (minutes < 10) sMinutes = "0" + sMinutes;
alert(sHours + ":" + sMinutes);
}
function addMinutes(date, minutes) {
return new Date(date.getTime() + minutes * 60000);
}
function convertTime(time)
{
var hours = Number(time.match(/^(\d+)/)[1]);
var minutes = Number(time.match(/:(\d+)/)[1]);
var AMPM = time.match(/\s(.*)$/)[1];
if (AMPM == "PM" && hours < 12) hours = hours + 12;
if (AMPM == "AM" && hours == 12) hours = hours - 12;
var sHours = hours.toString();
var sMinutes = minutes.toString();
if (hours < 10) sHours = "0" + sHours;
if (minutes < 10) sMinutes = "0" + sMinutes;
alert(sHours + ":" + sMinutes);
}
// calling way
var now = new Date();
now = DateFormat(now);
var next = addMinutes(now, 5);
next = OnlyTime(next);
var nowtime = convertTime(next);
How to add 5 minutes to the "now" variable?
Thanks

You should use getTime() method.
function AddMinutesToDate(date, minutes) {
return new Date(date.getTime() + minutes * 60000);
}
function AddMinutesToDate(date, minutes) {
return new Date(date.getTime() + minutes*60000);
}
function DateFormat(date){
var days = date.getDate();
var year = date.getFullYear();
var month = (date.getMonth()+1);
var hours = date.getHours();
var minutes = date.getMinutes();
minutes = minutes < 10 ? '0' + minutes : minutes;
var strTime = days + '/' + month + '/' + year + '/ '+hours + ':' + minutes;
return strTime;
}
var now = new Date();
console.log(DateFormat(now));
var next = AddMinutesToDate(now,5);
console.log(DateFormat(next));

//Date objects really covers milliseconds since 1970, with a lot of methods
//The most direct way to add 5 minutes to a Date object on creation is to add (minutes_you_want * 60 seconds * 1000 milliseconds)
var now = new Date(Date.now() + (5 * 60 * 1000));
console.log(now, new Date());

get minutes and add 5 to it and set minutes
var s = new Date();
console.log(s)
s.setMinutes(s.getMinutes()+5);
console.log(s)

Quite easy with JS, but to add a slight bit of variety to the answers, here's a way to do it with moment.js, which is a popular library for handling dates/times:
https://jsfiddle.net/ovqqsdh1/
var now = moment();
var future = now.add(5, 'minutes');
console.log(future.format("YYYY-MM-DD hh:mm"))

Try this:
var newDateObj = new Date();
newDateObj.setTime(oldDateObj.getTime() + (5 * 60 * 1000));

I'll give a very short answer on how to add any string of the form ny:nw:nd:nh:nm:ns where n is a number to the Date object:
/**
* Adds any date string to a Date object.
* The date string can be in any format like 'ny:nw:nd:nh:nm:ns' where 'n' are
* numbers and 'y' is for 'year', etc. or, you can have 'Y' or 'Year' or
* 'YEar' etc.
* The string's delimiter can be anything you like.
*
* #param Date date The Date object
* #param string t The date string to add
* #param string delim The delimiter used inside the date string
*/
function addDate (date, t, delim) {
var delim = (delim)? delim : ':',
x = 0,
z = 0,
arr = t.split(delim);
for(var i = 0; i < arr.length; i++) {
z = parseInt(arr[i], 10);
if (z != NaN) {
var y = /^\d+?y/i.test(arr[i])? 31556926: 0; //years
var w = /^\d+?w/i.test(arr[i])? 604800: 0; //weeks
var d = /^\d+?d/i.test(arr[i])? 86400: 0; //days
var h = /^\d+?h/i.test(arr[i])? 3600: 0; //hours
var m = /^\d+?m/i.test(arr[i])? 60: 0; //minutes
var s = /^\d+?s/i.test(arr[i])? 1: 0; //seconds
x += z * (y + w + d + h + m + s);
}
}
date.setSeconds(date.getSeconds() + x);
}
Test it:
var x = new Date();
console.log(x); //before
console.log('adds 1h:6m:20s');
addDate(x, '1h:6m:20s');
console.log(x); //after
console.log('adds 13m/30s');
addDate(x, '13m/30s', '/');
console.log(x); //after
Have fun!

This function will accept ISO format and also receives minutes as parameter.
function addSomeMinutesToTime(startTime: string | Date, minutestoAdd: number): string {
const dateObj = new Date(startTime);
const newDateInNumber = dateObj.setMinutes(dateObj.getMinutes() + minutestoAdd);
const processedTime = new Date(newDateInNumber).toISOString();
console.log(processedTime)
return processedTime;
}
addSomeMinutesToTime(("2019-08-06T10:28:10.687Z"), 5)

Add minutes into js time by prototype
Date.prototype.AddMinutes = function ( minutes ) {
minutes = minutes ? minutes : 0;
this.setMinutes( this.getMinutes() + minutes );
return this;
}
let now = new Date( );
console.log(now);
now.AddMinutes( 5 );
console.log(now);

How to get Javascript clock to increment based on a button click

I have the following piece of JavaScript which currently displays a digital clock on my webpage. I am creating a web based interactive story which is based on a day in the office. Everytime the user clicks a button to proceed onto the next part of the story I want to increment the clock by 30 minutes. Currently the clock is just showing real time. Ideally it would need to start at 9:00 am for the story then increment as the user goes through.
I have absolutely no idea how to do this and am fairly new to JavaScript, hopefully someone can help!
function displayTime() {
var currentTime = new Date();
var hours = currentTime.getHours();
var minutes = currentTime.getMinutes();
var seconds = currentTime.getSeconds();
var meridiem = "am"; // Default is AM
if (hours > 12) {
hours = hours - 12; // Convert to 12-hour format
meridiem = "PM"; // Keep track of the meridiem
}
if (hours === 0) {
hours = 12;
}
if(hours < 10) {
hours = "0" + hours;
}
if(minutes < 10) {
minutes = "0" + minutes;
}
if(seconds < 10) {
seconds = "0" + seconds;
}
var clockDiv = document.getElementById('clock');
clockDiv.innerText = hours + ":" + minutes + ":" + seconds + " " + meridiem;
}
displayTime();
setInterval(displayTime, 1000); });

To start at 09:00 o'clock, you could use
var d = new Date();
d.setHours(9);
d.setMinutes(0);
d.setSeconds(0);
Then, I would recommend using moment.js
function onClick() {
d = moment(d).add(30, "minutes").toDate();
var el = document.getElementById('clock');
el.innerHTML = moment(d).format("HH:mm:ss");
}
You can also do it without moment.js
function pad(t) {
return t < 10 ? "0" + t : t;
}
function onClick() {
d.setMinutes(d.getMinutes() + 30);
var h = d.getHours();
var m = d.getMinutes();
var s = d.getSeconds();
var time = pad(h) + ":" + pad(m) + ":" + pad(s);
document.getElementById("clock").innerHTML = time;
}
JSFiddle Demo (moment.js)
JSFiddle Demo (vanilla)

Working code (jquery), but you need to modify it according to your needs,
function displayTime(currentTime, hours, minutes, seconds) {
var meridiem = "am"; // Default is AM
if (hours > 12) {
hours = hours - 12; // Convert to 12-hour format
meridiem = "PM"; // Keep track of the meridiem
}
if (hours === 0) {
hours = 12;
}
if (hours < 10) {
hours = "0" + hours;
}
if (minutes < 10) {
minutes = "0" + minutes;
}
if (seconds < 10) {
seconds = "0" + seconds;
}
$('#clock').text(hours + ":" + minutes + ":" + seconds + " " + meridiem);
}
$(function() {
var currentTime = new Date();
var hours = currentTime.getHours();
var minutes = currentTime.getMinutes();
var seconds = currentTime.getSeconds();
displayTime(currentTime, hours, minutes, seconds);
$('#increment30').on('click', function() {
currentTime.setMinutes(currentTime.getMinutes() + 30);
var hours = currentTime.getHours();
var minutes = currentTime.getMinutes();
var seconds = currentTime.getSeconds();
displayTime(currentTime, hours, minutes, seconds);
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<div id='clock'>sss</div>
<button id='increment30'>INCREMENT 30</button>

Hi here is another one try here http://jsfiddle.net/Ltq9dhaw/ :
var time = new Date();
time.setHours(9);
time.setMinutes(0);
time.setSeconds(0);
function displayTime() {
var hours = time.getHours();
var minutes = time.getMinutes();
var seconds = time.getSeconds();
var meridiem = "am"; // Default is AM
if (hours > 12) {
hours = hours - 12; // Convert to 12-hour format
meridiem = "PM"; // Keep track of the meridiem
}
if (hours === 0) {
hours = 12;
}
if(hours < 10) {
hours = "0" + hours;
}
if(minutes < 10) {
minutes = "0" + minutes;
}
if(seconds < 10) {
seconds = "0" + seconds;
}
var clockDiv = document.getElementById('clock');
clockDiv.innerText = hours + ":" + minutes + ":" + seconds + " " + meridiem;
}
document.querySelector('#add').addEventListener('click',function(){
var minutes = 30;
time = new Date(time.getTime() + minutes*60000);
displayTime();
});
displayTime();

I'm gonna throw my hat in the ring here too.
var date = new Date(); // create a new Date object
date.setHours(9); // set it to 09:00:00
date.setMinutes(0);
date.setSeconds(0);
setInterval(function(){ // loop...
date.setSeconds(date.getSeconds()+1); // increment the seconds by 1
var str = ''; // build up a formatted string from the Date object
var h = date.getHours();
var m = date.getMinutes();
var s = date.getSeconds();
str += h.toString().length==1 ? '0' : ''; // if we have a single digit, prepend with a '0'
str += h;
str += ':'
str += m.toString().length==1 ? '0' : ''; // and again
str += m;
str += ':'
str += s.toString().length==1 ? '0' : ''; // and again
str += s;
$('#time').html(str); // set the element with ID 'time' to contain the string we just built
}, 1000); // ... every second
$('#increment').click(function(){ // when i click the element with id 'increment'
date.setMinutes(date.getMinutes()+30); // add 30 minutes to our Date object
});
Note that you will need to include jQuery on your page.
You can do that with the following snippet:
<script src="//code.jquery.com/jquery-1.11.3.min.js"></script>

Since you are using jQuery you can keep it simple:
function fmt2(v){return v<10?'0'+v:''+v;}
$(function(){
var t=new Date();t.setHours(9);t.setMinutes(0);t.setSeconds(0);
var offset=t.getTime() - new Date().getTime();
function displayTime(){
var currentTime= new Date((new Date()).getTime()+offset);
var hours = currentTime.getHours();
var meridiem=hours>=12?"PM":"AM";
hours=hours%12;
if (hours==0) hours=12;
var minutes = currentTime.getMinutes();
var seconds = currentTime.getSeconds();
$('#clock').text( fmt2(hours)+':'
+fmt2(minutes)+':'
+fmt2(seconds)+' '+meridiem);
}
$('#newtime').click(function(){offset+=60*30*1000;});
setInterval(displayTime,1000);
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="clock">09:00:00 AM</div>
<a id="newtime" href=#>add time</a>
I am working basically with the real time but there is an offset applied to it. The offset is calculated such, that the clock will always start at 9:00 AM.

Javascript date time two hours off

I have a javascript code set into my webpage but the date time is always two hours off. If anyone knows what's wrong please help.
Here's my relevant JavaScript code:
function show() {
var Digital = new Date()
var hours = Digital.getHours()
var minutes = Digital.getMinutes()
var seconds = Digital.getSeconds()
var dn = "AM"
if (hours > 12) {
dn = "PM"
hours = hours - 12
}
if (hours == 0) c
hours = 12
if (minutes <= 9)
minutes = "0" + minutes
if (seconds <= 9)
seconds = "0" + seconds
document.dform.currenttime.value = hours + ":" + minutes + ":" + seconds + " " + dn
setTimeout("show()", 1000)
}
show();

You have a c right here:
if (hours==0)c
Delete the c. It works. You're welcome.
I suggest proofreading your code before you come asking for help, but more importantly you should format your code so that it's legible enough to proofread. As an example:
function show() {
var Digital = new Date();
var hours = Digital.getHours();
var minutes = Digital.getMinutes();
var seconds = Digital.getSeconds();
var dn = "AM";
if(hours > 12) {
dn = "PM";
hours -= 12;
}
if(hours == 0) hours = 12;
if(minutes <= 9) minutes = "0" + minutes;
if(seconds <= 9) seconds = "0" + seconds;
document.dform.currenttime.value = hours + ":" + minutes + ":" + seconds + " " + dn;
}
var clock = setInterval(show, 1000);
This is easier to read and you likely would've noticed the erroneous c.

How to get AM or PM?

I have buttons with the names of big cities.
Clicking them, I want to get local time in them.
$('#btnToronto').click(function () {
var hours = new Date().getHours();
var hours = hours-2; //this is the distance from my local time
alert ('Toronto time: ' + hours + ' h'); //this works correctly
});
But how can I get AM or PM ?

You should just be able to check if hours is greater than 12.
var ampm = (hours >= 12) ? "PM" : "AM";
But have you considered the case where the hour is less than 2 before you subtract 2? You'd end up with a negative number for your hour.

Try below code:
$('#btnToronto').click(function () {
var hours = new Date().getHours();
var hours = (hours+24-2)%24;
var mid='am';
if(hours==0){ //At 00 hours we need to show 12 am
hours=12;
}
else if(hours>12)
{
hours=hours%12;
mid='pm';
}
alert ('Toronto time: ' + hours + mid);
});

You can use like this,
var dt = new Date();
var h = dt.getHours(), m = dt.getMinutes();
var _time = (h > 12) ? (h-12 + ':' + m +' PM') : (h + ':' + m +' AM');
Hopes this will be better with minutes too.

const now = new Date()
.toLocaleTimeString([], { hour: '2-digit', minute: '2-digit', hour12: true })
.toLowerCase();
Basically you just need to put {hour12: true} and it's done.
result => now = "21:00 pm";

If hours is less than 12, it's the a.m..
var hours = new Date().getHours(), // this is local hours, may want getUTCHours()
am;
// adjust for timezone
hours = (hours + 24 - 2) % 24;
// get am/pm
am = hours < 12 ? 'a.m.' : 'p.m.';
// convert to 12-hour style
hours = (hours % 12) || 12;
Now, for me as you didn't use getUTCHours, it is currently 2 hours after
hours + ' ' + am; // "6 p.m."

very interesting post. in a function that take a date in parameter it can appear like that :
function hourwithAMPM(dateInput) {
var d = new Date(dateInput);
var ampm = (d.getHours() >= 12) ? "PM" : "AM";
var hours = (d.getHours() >= 12) ? d.getHours()-12 : d.getHours();
return hours+' : '+d.getMinutes()+' '+ampm;
}

with date.js
<script type="text/javascript" src="http://www.datejs.com/build/date.js"></script>
you can write like this
new Date().toString("hh:mm tt")
cheet sheet is here format specifiers
tt is for AM/PM

Try this:
h = h > 12 ? h-12 +'PM' : h +'AM';

The best way without extensions and complex coding:
date.toLocaleString([], { hour12: true});
How do you display javascript datetime in 12 hour AM/PM format?

here is get time i use in my code
let current = new Date();
let cDate = current.getDate() + '-' + (current.getMonth() + 1) + '-' + current.getFullYear();
let hours = current.getHours();
let am_pm = (hours >= 12) ? "PM" : "AM";
if(hours >= 12){
hours -=12;
}
let cTime = hours + ":" + current.getMinutes() + ":" + current.getSeconds() +" "+ am_pm;
let dateTime = cDate + ' ' + cTime;
console.log(dateTime); // 1-3-2021 2:28:14 PM

var now = new Date();
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;
return timewithampm;

var dt = new Date();
var h = dt.getHours(),
m = dt.getMinutes();
var time;
if (h == 12) {
time = h + ":" + m + " PM";
} else {
time = h > 12 ? h - 12 + ":" + m + " PM" : h + ":" + m + " AM";
}
//var time = h > 12 ? h - 12 + ":" + m + " PM" : h + ":" + m + " AM";
console.log(`CURRENT TIME IS ${time}`);
This will work for everytime,

function Timer() {
var dt = new Date()
if (dt.getHours() >= 12){
ampm = "PM";
} else {
ampm = "AM";
}
if (dt.getHours() < 10) {
hour = "0" + dt.getHours();
} else {
hour = dt.getHours();
}
if (dt.getMinutes() < 10) {
minute = "0" + dt.getMinutes();
} else {
minute = dt.getMinutes();
}
if (dt.getSeconds() < 10) {
second = "0" + dt.getSeconds();
} else {
second = dt.getSeconds();
}
if (dt.getHours() > 12) {
hour = dt.getHours() - 12;
} else {
hour = dt.getHours();
}
if (hour < 10) {
hour = "0" + hour;
} else {
hour = hour;
}
document.getElementById('time').innerHTML = hour + ":" + minute + ":" + second + " " + ampm;
setTimeout("Timer()", 1000);
}
Timer()
<div id="time"></div>