Develop Reference

How to set Am and Pm for Clock [duplicate]

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>

Jquery function to Increment one hours based on time input string

I have string value in this format.
9:00 am
i want it to be like this.
9:00 am - 10:00 am
second hour must be 1 greater then first one. for example if time is
7:00 am then it should be 7:00 am - 8:00 am
how can i do that using jquery?
i tried this but its not working as it works now.
var time= "9:00 am"
var nexttime=time.setHours(time.getHours()+1)
alert(nexttime);
getting error of
time.getHours is not a function

You can try this :
function increaseTimeByOne(timeStr) {
var splitedTimeStr = timeStr.split(':');
var hours = parseInt(splitedTimeStr[0]);
var meridiem = splitedTimeStr[1].split(" ")[1];
var minutes = splitedTimeStr[1].split(" ")[0];
var nextHours = (hours + 1);
var nextMeridiem;
if (hours >= 11) {
if (meridiem.toLowerCase() == "am") {
nextMeridiem = "pm";
} else if (meridiem.toLowerCase() == "pm") {
nextMeridiem = "am";
}
if (nextHours > 12) {
nextHours = nextHours - 12;
}
} else {
nextMeridiem = meridiem;
}
return nextHours + ":" + minutes + " " + nextMeridiem;
}
and using above function as
var timestr="9:00 am";
var next_hour = increaseTimeByOne(timeStr);
alert(next_hour);

refer this
var time=new Date();
time.setHours(9, 00, 00);
var nexttime=(time.getHours()+1);
alert(nexttime);
// to get hrs mins and seconds
var nexttime=(time.getHours()+1) +":"+time.getMinutes()+":"+time.getSeconds();

YOu can make your time string like:
function increaseTimeByOne(t) {
var s = t.split(':');
var n = parseInt(s[0], 10);
var nt = (n + 1) + ":00 ";
var ampm = n >= 11 ? "pm" : "am";
return t + " - " + nt + ampm;
}
console.log(increaseTimeByOne('9:00 am'));
console.log(increaseTimeByOne('11:00 am'));
console.log(increaseTimeByOne('12:00 pm'));

Page last modified using Javascript with 12 hour clock showing am or pm

I'm trying to create a script in Javascript that shows when a page was last modified, which returns the date, time, in am or pm format, of modification.
Clearly I am doing something wrong. I can't get the script to run, and it will be in my function AmPm. Can someone please help?
// Javascript code for page modification
// Shows the date, time, am or pm, of modification.
// This section sets the date of modification
function lastModified() {
var modiDate = new Date(document.lastModified);
var showAs = modiDate.getDate() + "." + (modiDate.getMonth() + 1) + "." + modiDate.getFullYear();
return showAs
}
// This section sets the time of modification
function GetTime() {
var modiDate = new Date();
var Seconds
if (modiDate.getSeconds() < 10) {
Seconds = "0" + modiDate.getSeconds();
} else {
Seconds = modiDate.getSeconds();
}
// This section writes the above in the document
var modiDate = new Date();
var CurTime = modiDate.getHours() + ":" + modiDate.getMinutes() + ":" + Seconds
return CurTime
}
// This section decides if its am or pm
function AmPm() {
var hours = new Date().getHours();
var hours = (hours + 24 - 2) % 24;
var mid = 'AM';
if (hours == 0) { // At 00 hours (midnight) we need to display 12 am
hours = 12;
} else if (hours > 12) // At 12pm (Midday) we need to display 12 pm
{
hours = hours % 12;
mid = 'PM';
}
}
var mid = //This is where I am stuck!!
return AmPm
document.write("This webpage was last edited on: ");
document.write(lastModified() + " at " + GetTime() + AmPm());
document.write("");
document.write(" NZ Daylight Savings Time.");
document.write("");

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;
}

How to make Javascript time automatically update

I am using the following Javascript code to display the time on my website. How can I make this update automatically.
Thanks
<section class="portlet grid_6 leading">
<header>
<h2>Time<span id="time_span"></span></h2>
</header>
<script type="text/javascript">
var currentTime = new Date()
var hours = currentTime.getHours()
var minutes = currentTime.getMinutes()
if (minutes < 10){
minutes = "0" + minutes
}
var t_str = hours + ":" + minutes + " ";
if(hours > 11){
t_str += "PM";
} else {
t_str += "AM";
}
document.getElementById('time_span').innerHTML = t_str;
</script>
</section>

Use setTimeout(..) to call a function after a specific time. In this specific case, it is better to use setInterval(..)
function updateTime(){
var currentTime = new Date()
var hours = currentTime.getHours()
var minutes = currentTime.getMinutes()
if (minutes < 10){
minutes = "0" + minutes
}
var t_str = hours + ":" + minutes + " ";
if(hours > 11){
t_str += "PM";
} else {
t_str += "AM";
}
document.getElementById('time_span').innerHTML = t_str;
}
setInterval(updateTime, 1000);

Add all your javascript code in a function called updateClock() placed in the <head> section of your page, and alter the <body> tag that way:
<body onload="updateClock(); setInterval('updateClock()', 1000 )">
It will recalculate and redisplay the time every second. Since you only display hours and minutes, you can use a longer interval. If you want to update time every numSeconds you should use something like
<body onload="updateClock(); setInterval('updateClock()', numSeconds * 1000 )">
And of course, this one is just one of many gazillions solutions that you can find out there.

There are plenty of clock libraries out there. Perhaps check out this previous post: How to create a jquery clock timer

try this, a tidier version:
var el = document.getElementById('time_span')
setInterval(function() {
var currentTime = new Date(),
hours = currentTime.getHours(),
minutes = currentTime.getMinutes(),
ampm = hours > 11 ? 'PM' : 'AM';
hours += hours < 10 ? '0' : '';
minutes += minutes < 10 ? '0' : '';
el.innerHTML = hours + ":" + minutes + " " + ampm;
}, 1000);

GetTime();
function GetTime(){
var CurrentTime = new Date()
var hour = CurrentTime.getHours()
var minute = CurrentTime.getMinutes()
var second = CurrentTime.getSeconds()
if(minute < 10){
minute = "0" + minute
}
if(second < 10){
second = "0" + second
}
var GetCurrentTime = hour + ":" + minute + ":" + second + " ";
if(hour > 11){
GetCurrentTime += "p.m."
}else{
GetCurrentTime += "a.m."
}
document.getElementById("CurrentTime").innerHTML = GetCurrentTime;
setTimeout(GetTime,1000)
}
<span id="CurrentTime"></span>

A bit less messy would be:
timer();
function timer(){
var now = new Date,
hours = now.getHours(),
ampm = hours<12 ? ' AM' : ' PM',
minutes = now.getMinutes(),
seconds = now.getSeconds(),
t_str = [hours-12, //otherwise: what's the use of AM/PM?
(minutes < 10 ? "0" + minutes : minutes),
(seconds < 10 ? "0" + seconds : seconds)]
.join(':') + ampm;
document.getElementById('time_span').innerHTML = t_str;
setTimeout(timer,1000);
}
The timer updates (roughly) every second (= 1000 Ms), using setTimeout from within the timer function.
​See it in action

This code output format->00:00:00 and refresh automatically like real time clock, hope it works..
function r(txt) {
document.write(tex);
}
function createTIME() {
d = new Date();
var time = addZERO(d.getHours()) + ':' + addZERO(d.getMinutes()) + ':' + addZERO(d.getSeconds());
return 'Present Time = ' + time;
}
function doDyn() {
document.getElementById('Dyn').innerHTML = createTIME();
}
function addZERO(val) {
return ((val < 10) ? '0' : '') + val;
}

GetTime();
function GetTime(){
var CurrentTime = new Date()
var hour = CurrentTime.getHours()
var minute = CurrentTime.getMinutes()
var second = CurrentTime.getSeconds()
if(minute < 10){
minute = "0" + minute
}
if(second < 10){
second = "0" + second
}
var GetCurrentTime = hour + ":" + minute + ":" + second + " ";
if(hour > 11){
GetCurrentTime += "p.m."
}else{
GetCurrentTime += "a.m."
}
<!-- Try changing innerHTML to document.getElementById("CurrentTime").value -->
document.getElementById("CurrentTime").value = GetCurrentTime;
setTimeout(GetTime,1000)
}
<span id="CurrentTime"></span>

timer();
function timer(){
var currentTime = new Date()
var hours = currentTime.getHours()
var minutes = currentTime.getMinutes()
var sec = currentTime.getSeconds()
if (minutes < 10){
minutes = "0" + minutes
}
if (sec < 10){
sec = "0" + sec
}
var t_str = hours + ":" + minutes + ":" + sec + " ";
if(hours > 11){
t_str += "PM";
} else {
t_str += "AM";
}
document.getElementById('time_span').innerHTML = t_str;
setTimeout(timer,1000);
}
<header>
<h2>Time<span id="time_span"></span></h2>
</header>

javascript date conversion

I want to take an existing javascript string and convert it javascript timestamp object,
then store as format YYYYMMDDHHMMSS
mystring = "Mon Nov 07 2011 09:20:58 GMT-0500 (Eastern Standard Time)";
var timeObject = new Date(mystring);

// pass in javascript date object, return variations of YYYY-MM-DD HH:MM:SS
function fnFormatDateTime(timeObject)
{
// construct day/month/year
var month = timeObject.getMonth() + 1;
if (month < 10){
month = "0" + month;
}
var day = timeObject.getDate();
if (day < 10){
day = "0" + day;
}
var year = timeObject.getFullYear();
var currentDate = (" " + year + month + day).trim();
var currentDateFormatted = ( year +"-"+ month +"-"+ day);
// construct current time
var hours = timeObject.getHours();
if (hours < 10){
hours = "0" + hours;
}
var minutes = timeObject.getMinutes();
if (minutes < 10){
minutes = "0" + minutes;
}
var seconds = timeObject.getSeconds();
if (seconds < 10){
seconds = "0" + seconds;
}
var currentTime = (hours + minutes + seconds + " ").trim();
var currentTimeFormatted = (hours +":"+ minutes +":"+ seconds);
var retArray = new Array();
retArray[0] = (currentDateFormatted + " " + currentTimeFormatted);
retArray[1] = (currentDate+ " " + currentTime);
retArray[2] = currentDate;
retArray[3] = currentTime;
return retArray;
}