I need more than one clock. In my attempt, I replaced document.getElementById with Document.getElementsByClassName. Unfortunately, it does not work the way I tried. Can someone help me please?
function currentTime() {
var date = new Date();
var hour = date.getHours();
var min = date.getMinutes();
var midday = "AM";
midday = (hour >= 12) ? "PM" : "AM";
hour = (hour == 0) ? 12 : ((hour > 12) ? (hour - 12): hour);
hour = updateTime(hour);
min = updateTime(min);
let hours = document.createElement('span')
let points = document.createElement('span')
let mins = document.createElement('span')
let blank = document.createElement('span')
let middays = document.createElement('span')
hours.innerHTML = hour
points.innerHTML = ":"
mins.innerHTML = min
blank.innerHTML = " "
middays.innerHTML = midday
document.getElementById("clock").innerHTML = ""
document.getElementById("clock").appendChild(hours);
document.getElementById("clock").appendChild(points);
document.getElementById("clock").appendChild(mins);
document.getElementById("clock").appendChild(blank);
document.getElementById("clock").appendChild(middays);
var t = setTimeout(currentTime, 1000);
}
function updateTime(k) {
if (k < 10) {
return "0" + k;
}
else {
return k;
}
}
currentTime();
<p id="clock"></p>
const clocks = document.querySelectorAll('.clock');
function currentTime() {
var date = new Date();
var hour = date.getHours();
var min = date.getMinutes();
var midday = "AM";
midday = (hour >= 12) ? "PM" : "AM";
hour = (hour == 0) ? 12 : ((hour > 12) ? (hour - 12): hour);
hour = updateTime(hour);
min = updateTime(min);
const clock = `${hour}:${min} ${midday}`
for (var i = 0; i < clocks.length; i++) {
clocks[i].innerHTML = clock;
}
var t = setTimeout(currentTime, 1000);
}
function updateTime(k) {
if (k < 10) {
return "0" + k;
}
else {
return k;
}
}
currentTime();
<p class="clock"></p>
<p class="clock"></p>
<p class="clock"></p>
Using getElementsByClassName(), if you read the function, elements is plural. The function getElementsByClassName() actually returns an array! So, you just need to use:
document.getElementsByClassName('class')[index].
Hopefully, you understand how arrays work. If not, here is MDN and w3schools. I recommend reading w3schools first then seeing MDN
you can't have multiple id on the same page, so you need to replace that with a class and select all of them with document.querySelectorAll(".class-name") you can then loop over it.
I done this, expect it was about your question ?
function currentTime(elementsClass)
{
let AllClock = document.getElementsByClassName(elementsClass)
, theClock = AllClock[0]
, hours = document.createElement('span')
, points = document.createElement('span')
, mins = document.createElement('span')
, blank = document.createElement('span')
, middays = document.createElement('span')
, date = null
, hour = null
, theClockInnerHTML = ''
;
theClock.appendChild(hours);
theClock.appendChild(points);
theClock.appendChild(mins);
theClock.appendChild(blank);
theClock.appendChild(middays);
points.textContent = ":"
blank.textContent = " "
updateClock()
setInterval(updateClock, 1000);
function updateClock()
{
date = new Date()
hour = date.getHours()
hours.textContent = time2digits( (hour == 0) ? 12 : ((hour > 12) ? (hour - 12): hour) )
mins.textContent = time2digits( date.getMinutes())
middays.textContent = (hour >= 12) ? "PM" : "AM"
if (theClock.innerHTML!=theClockInnerHTML) {
theClockInnerHTML = theClock.innerHTML
for(let i=1;i<AllClock.length;i++) {
AllClock[i].innerHTML = theClockInnerHTML
}
}
}
function time2digits(k)
{
return (k < 10) ? ("0" + k) : k
}
}
currentTime('clock');
<p class="clock"></p>
<p class="clock"></p>
<p class="clock"></p>
It is 4:11PM here now but my output is shown as 'Good Morning' - why is this happening?
$(document).ready(function() {
function dateTime() {
var ndate = new Date();
var h = ndate.getHours() % 12;
var format = h >= 12 ? 'PM' : 'AM';
var m = ndate.getMinutes().toString();
var s = ndate.getSeconds().toString();
if (h < 12) {
h = "0" + h;
$("h3.day-message").html("Good Morning");
} else if (h < 18) {
$("h3.day-message").html("Good Afternoon");
} else {
$("h3.day-message").html("Good Evening");
}
if (s < 10) {
s = "0" + s;
}
if (m < 10) {
m = "0" + m;
}
$('.date').html(h + ":" + m + ":" + s + format);
}
setInterval(dateTime, 1000);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<h3 class="day-message"></h3>
<span class="date"></span>
The issue is because you are using the modulo operator. This means that your h > 12 check will never be hit as the remainder of the division cannot be greater than 12. It's because of this your logic always believes it's still the morning. To fix this, just use a simple < check when comparing the hour figure.
Also note that you have some issues with the formatting of the date, such as appending extra zeroes so you end up with 011 as hour values. You can fix this by using slice().
With all that said, try this:
$(document).ready(function() {
function dateTime() {
var ndate = new Date();
var hours = ndate.getHours();
var message = hours < 12 ? 'Good Morning' : hours < 18 ? 'Good Afternoon' : 'Good Evening';
$("h3.day-message").text(message);
$('.date').html(hours.leadingZeroes(2) + ":" + ndate.getMinutes().leadingZeroes(2) + ":" + ndate.getSeconds().leadingZeroes(2) + (hours < 12 ? 'AM' : 'PM'));
}
setInterval(dateTime, 1000);
});
Number.prototype.leadingZeroes = function(len) {
return (new Array(len).fill('0', 0).join('') + this).slice(-Math.abs(len));
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<h3 class="day-message"></h3>
<span class="date"></span>
$(document).ready(function() {
function dateTime() {
var format="";
var ndate = new Date();
var hr = ndate.getHours();
var h = hr % 12;
if (hr < 12)
{
greet = 'Good Morning';
format='AM';
}
else if (hr >= 12 && hr <= 17)
{
greet = 'Good Afternoon';
format='PM';
}
else if (hr >= 17 && hr <= 24)
greet = 'Good Evening';
var m = ndate.getMinutes().toString();
var s = ndate.getSeconds().toString();
if (h < 12) {
h = "0" + h;
$("h3.day-message").html(greet);
} else if (h < 18) {
$("h3.day-message").html(greet);
} else {
$("h3.day-message").html(greet);
}
if (s < 10) {
s = "0" + s;
}
if (m < 10) {
m = "0" + m;
}
$('.date').html(h + ":" + m + ":" + s + format);
}
setInterval(dateTime, 1000);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<h3 class="day-message"></h3>
<span class="date"></span>
You are calculating mode, so h will never be greater that 12
So, Instead of
var h = ndate.getHours() % 12;
Use it
var h = ndate.getHours();
Explaination: modulo operator(%) will divide total hours by 12 and return the Remainder.
For example if current time is 4 pm, I'll be 16 hours, so It'll return 4
Without jQuery
const messages = [
{ ampm: "am", "greet": 'Good Morning' },
{ ampm: "pm", "greet": 'Good Afternoon' },
{ ampm: "pm", "greet": 'Good Evening' }
];
window.addEventListener("DOMContentLoaded", () => {
const dateSpan = document.getElementById("date");
const message = document.getElementById("day-message");
const dateTime = () => {
let now = new Date(),
hour = now.getHours(),
hh = hour % 12, // (hour % 12).toString().padStart(2,"0") if you want leading 0
mm = now.getMinutes().toString().padStart(2,"0"),
ss = now.getSeconds(),
period = 0;
if (hour < 12) period = 0;
else if (hour >= 12 && hour < 17) period = 1;
else if (hour >= 17 && hour <= 24) period = 2;
message.textContent = messages[period].greet;
dateSpan.textContent = `${hh}:${mm}${messages[period].ampm}`;
};
setInterval(dateTime, 500);
});
<h3 id="day-message"></h3>
<span id="date"></span>
Display Good Morning/Afternoon/Evening using javascript in 12hours format
const displayGreeting =()=>{
const myDate = new Date();
const hrs = myDate.getHours();
let greet;
if (hrs < 12)
greet = 'Good Morning';
else if (hrs >= 12 && hrs <= 17)
greet = 'Good Afternoon';
else if (hrs >= 17 && hrs <= 24)
greet = 'Good Evening';
return greet
}
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>
What is the best way to convert the following JSON returned value from a 24-hour format to 12-hour format w/ AM & PM? The date should stay the same - the time is the only thing that needs formatting.
February 04, 2011 19:00:00
P.S. Using jQuery if that makes it any easier! Would also prefer a simple function/code and not use Date.js.
This is how you can change hours without if statement:
hours = ((hours + 11) % 12 + 1);
UPDATE 2: without seconds option
UPDATE: AM after noon corrected, tested: http://jsfiddle.net/aorcsik/xbtjE/
I created this function to do this:
function formatDate(date) {
var d = new Date(date);
var hh = d.getHours();
var m = d.getMinutes();
var s = d.getSeconds();
var dd = "AM";
var h = hh;
if (h >= 12) {
h = hh - 12;
dd = "PM";
}
if (h == 0) {
h = 12;
}
m = m < 10 ? "0" + m : m;
s = s < 10 ? "0" + s : s;
/* if you want 2 digit hours:
h = h<10?"0"+h:h; */
var pattern = new RegExp("0?" + hh + ":" + m + ":" + s);
var replacement = h + ":" + m;
/* if you want to add seconds
replacement += ":"+s; */
replacement += " " + dd;
return date.replace(pattern, replacement);
}
alert(formatDate("February 04, 2011 12:00:00"));
//it is pm if hours from 12 onwards
suffix = (hours >= 12)? 'pm' : 'am';
//only -12 from hours if it is greater than 12 (if not back at mid night)
hours = (hours > 12)? hours -12 : hours;
//if 00 then it is 12 am
hours = (hours == '00')? 12 : hours;
For anyone reading who wants ONLY the time in the output, you can pass options to JavaScript's Date::toLocaleString() method. Example:
var date = new Date("February 04, 2011 19:00:00");
var options = {
hour: 'numeric',
minute: 'numeric',
hour12: true
};
var timeString = date.toLocaleString('en-US', options);
console.log(timeString);
timeString will be set to:
8:00 AM
Add "second: 'numeric'" to your options if you want seconds too. For all option see this.
Here's a reasonably terse way to do it using a Prototype:
Date.prototype.getFormattedTime = function () {
var hours = this.getHours() == 0 ? "12" : this.getHours() > 12 ? this.getHours() - 12 : this.getHours();
var minutes = (this.getMinutes() < 10 ? "0" : "") + this.getMinutes();
var ampm = this.getHours() < 12 ? "AM" : "PM";
var formattedTime = hours + ":" + minutes + " " + ampm;
return formattedTime;
}
Then all you have to do is convert your string value to a date and use the new method:
var stringValue = "February 04, 2011 19:00:00;
var dateValue = new Date(stringValue);
var formattedTime = dateValue.getFormattedTime();
Or in a single line:
var formattedTime = new Date("February 04, 2011 19:00:00").getFormattedTime();
Keep it simple and clean
var d = new Date();
var n = d.toLocaleString();
https://jsfiddle.net/rinu6200/3dkdxaad/#base
function pad(num) {return ("0" + num).slice(-2);}
function time1() {
var today = new Date(),
h = today.getHours(),
m = today.getMinutes(),
s = today.getSeconds();
h = h % 12;
h = h ? h : 12; // the hour '0' should be '12'
clk.innerHTML = h + ':' +
pad(m) + ':' +
pad(s) + ' ' +
(h >= 12 ? 'PM' : 'AM');
}
window.onload = function() {
var clk = document.getElementById('clk');
t = setInterval(time1, 500);
}
<span id="clk"></span>
jQuery doesn't have any Date utilities at all. If you don't use any additional libraries, the usual way is to create a JavaScript Date object and then extract the data from it and format it yourself.
For creating the Date object you can either make sure that your date string in the JSON is in a form that Date understands, which is IETF standard (which is basically RFC 822 section 5). So if you have the chance to change your JSON, that would be easiest. (EDIT: Your format may actually work the way it is.)
If you can't change your JSON, then you'll need to parse the string yourself and get day, mouth, year, hours, minutes and seconds as integers and create the Date object with that.
Once you have your Date object you'll need to extract the data you need and format it:
var myDate = new Date("4 Feb 2011, 19:00:00");
var hours = myDate.getHours();
var am = true;
if (hours > 12) {
am = false;
hours -= 12;
} else (hours == 12) {
am = false;
} else (hours == 0) {
hours = 12;
}
var minutes = myDate.getMinutes();
alert("It is " + hours + " " + (am ? "a.m." : "p.m.") + " and " + minutes + " minutes".);
1) "Squared" instructions for making 24-hours became 12-hours:
var hours24 = new Date().getHours(); // retrieve current hours (in 24 mode)
var dayMode = hours24 < 12 ? "am" : "pm"; // if it's less than 12 then "am"
var hours12 = hours24 <= 12 ? (hours24 == 0 ? 12 : hours24) : hours24 - 12;
// "0" in 24-mode now becames "12 am" in 12-mode – thanks to user #Cristian
document.write(hours12 + " " + dayMode); // printing out the result of code
2) In a single line (same result with slightly different algorythm):
var str12 = (h24 = new Date().getHours()) && (h24 - ((h24 == 0)? -12 : (h24 <= 12)? 0 : 12)) + (h24 < 12 ? " am" : " pm");
Both options return string, like "5 pm" or "10 am" etc.
You can take a look at this. One of the examples says:
var d = new Date(dateString);
Once you have Date object you can fairly easy play with it. You can either call toLocaleDateString, toLocaleTimeString or you can test if getHours is bigger than 12 and then just calculate AM/PM time.
date = date.replace(/[0-9]{1,2}(:[0-9]{2}){2}/, function (time) {
var hms = time.split(':'),
h = +hms[0],
suffix = (h < 12) ? 'am' : 'pm';
hms[0] = h % 12 || 12;
return hms.join(':') + suffix
});
edit: I forgot to deal with 12 o'clock am/pm. Fixed.
var dt = new Date();
var h = dt.getHours(), m = dt.getMinutes();
var thistime = (h > 12) ? (h-12 + ':' + m +' PM') : (h + ':' + m +' AM');
console.log(thistime);
Here is the Demo
function GetTime(date) {
var currentTime = (new Date(date))
var hours = currentTime.getHours()
//Note: before converting into 12 hour format
var suffix = '';
if (hours > 11) {
suffix += "PM";
} else {
suffix += "AM";
}
var minutes = currentTime.getMinutes()
if (minutes < 10) {
minutes = "0" + minutes
}
if (hours > 12) {
hours -= 12;
} else if (hours === 0) {
hours = 12;
}
var time = hours + ":" + minutes + " " + suffix;
return time;
}
Please try with below code
var s = "15 Feb 2015 11.30 a.m";
var times = s.match("((([0-9])|([0-2][0-9])).([0-9][0-9])[\t ]?((a.m|p.m)|(A.M|P.M)))");
var time = "";
if(times != null){
var hour = times[2];
if((times[6] == "p.m" || times[6] == "P.M")){
if(hour < 12){
hour = parseInt(hour) + parseInt(12);
}else if(hour == 12){
hour = "00";
}
}
time = [hour, times[5], "00"].join(":");
}
Thanks
This worked for me!
function main() {
var time = readLine();
var formattedTime = time.replace('AM', ' AM').replace('PM', ' PM');
var separators = [':', ' M'];
var hms = formattedTime.split(new RegExp('[' + separators.join('') + ']'));
if (parseInt(hms[0]) < 12 && hms[3] == 'P')
hms[0] = parseInt(hms[0]) + 12;
else if (parseInt(hms[0]) == 12 && hms[3] == 'A')
hms[0] = '00';
console.log(hms[0] + ':' + hms[1] + ':' + hms[2]);
}
You could try this more generic function:
function to12HourFormat(date = (new Date)) {
return {
hours: ((date.getHours() + 11) % 12 + 1),
minutes: date.getMinutes(),
meridian: (date.getHours() >= 12) ? 'PM' : 'AM',
};
}
Returns a flexible object format.
https://jsbin.com/vexejanovo/edit
I'm a relative newbie, but here's what I came up with for one of my own projects, and it seems to work. There may be simpler ways to do it.
function getTime() {
var nowTimeDate = new Date();
var nowHour = nowTimeDate.getHours();
var nowMinutes = nowTimeDate.getMinutes();
var suffix = nowHour >= 12 ? "pm" : "am";
nowHour = (suffix == "pm" & (nowHour > 12 & nowHour < 24)) ? (nowHour - 12) : nowHour;
nowHour = nowHour == 0 ? 12 : nowHour;
nowMinutes = nowMinutes < 10 ? "0" + nowMinutes : nowMinutes;
var currentTime = nowHour + ":" + nowMinutes + suffix;
document.getElementById("currentTime").innerHTML = currentTime;
}
this is your html code where you are calling function to convert 24 hour time format to 12 hour with am/pm
<pre id="tests" onClick="tConvert('18:00:00')">
test on click 18:00:00
</pre>
<span id="rzlt"></span>
now in js code write this tConvert function as it is
function tConvert (time)
{
// Check correct time format and split into components
time = time.toString ().match (/^([01]\d|2[0-3])(:)([0-5]\d)(:[0-5]\d)?$/) || [time];
if (time.length > 1)
{ // If time format correct
time = time.slice (1); // Remove full string match value
time[5] = +time[0] < 12 ? 'AM' : 'PM'; // Set AM/PM
time[0] = +time[0] % 12 || 12; // Adjust hours
}
//return time; // return adjusted time or original string
var tel = document.getElementById ('rzlt');
tel.innerHTML= time.join ('');
}
converting 18:00:00 to 6:00:00PM working for me
This function will convert in both directions:
12 to 24 hour or 24 to 12 hour
function toggle24hr(time, onoff){
if(onoff==undefined) onoff = isNaN(time.replace(':',''))//auto-detect format
var pm = time.toString().toLowerCase().indexOf('pm')>-1 //check if 'pm' exists in the time string
time = time.toString().toLowerCase().replace(/[ap]m/,'').split(':') //convert time to an array of numbers
time[0] = Number(time[0])
if(onoff){//convert to 24 hour:
if((pm && time[0]!=12)) time[0] += 12
else if(!pm && time[0]==12) time[0] = '00' //handle midnight
if(String(time[0]).length==1) time[0] = '0'+time[0] //add leading zeros if needed
}else{ //convert to 12 hour:
pm = time[0]>=12
if(!time[0]) time[0]=12 //handle midnight
else if(pm && time[0]!=12) time[0] -= 12
}
return onoff ? time.join(':') : time.join(':')+(pm ? 'pm' : 'am')
}
Here's some examples:
//convert to 24 hour:
toggle24hr('12:00am') //returns 00:00
toggle24hr('2:00pm') //returns 14:00
toggle24hr('8:00am') //returns 08:00
toggle24hr('12:00pm') //returns 12:00
//convert to 12 hour:
toggle24hr('14:00') //returns 2:00pm
toggle24hr('08:00') //returns 8:00am
toggle24hr('12:00') //returns 12:00pm
toggle24hr('00:00') //returns 12:00am
//you can also force a specific format like this:
toggle24hr('14:00',1) //returns 14:00
toggle24hr('14:00',0) //returns 2:00pm
Here you go
var myDate = new Date("February 04, 2011 19:00:00");
var hr = myDate.getHours();
var convHrs = "";
var ampmSwitch = "";
ampmSwitch = (hr > 12)? "PM":"AM";
convHrs = (hr >12)? hr-12:hr;
// Build back the Date / time using getMonth/ getFullYear and getDate and other functions on the myDate object. Enclose it inside a func and there you got the working 12 hrs converter ;)
And here's the converter func for yas ;) Happy coding!!
function convertTo12Hrs(yourDateTime){
var myDate = new Date(yourDateTime);
var dtObject = new Object();
var monthsCollection = {0:"January", 1:"February",2:"March",3:"April",4:"May",5:"June",6:"July",7:"August",8:"September",9:"October",10:"November",11:"December"};
dtObject.year = myDate.getFullYear();
dtObject.month = monthsCollection[myDate.getMonth()];
dtObject.day = (myDate.getDate()<10)?"0"+myDate.getDate():myDate.getDate();
dtObject.minutes = (myDate.getMinutes() < 10)? "0"+myDate.getMinutes():myDate.getMinutes();
dtObject.seconds = (myDate.getSeconds() < 10)? "0"+myDate.getSeconds():myDate.getSeconds();
// Check if hours are greater than 12? Its PM
dtObject.ampmSwitch = (myDate.getHours() > 12)? "PM":"AM";
// Convert the hours
dtObject.hour = (myDate.getHours() > 12)?myDate.getHours()-12:myDate.getHours();
// Add the 0 as prefix if its less than 10
dtObject.hour = (dtObject.hour < 10)? "0"+dtObject.hour:dtObject.hour;
// Format back the string as it was or return the dtObject object or however you like. I am returning the object here
return dtObject;
}
invoke it like
convertTo12Hrs("February 04, 2011 19:00:00"); it will return you the object, which in turn you can use to format back your datetime string as you fancy...
You're going to end up doing alot of string manipulation anyway,
so why not just manipulate the date string itself?
Browsers format the date string differently.
Netscape ::: Fri May 11 2012 20:15:49 GMT-0600 (Mountain Daylight Time)
IE ::: Fri May 11 20:17:33 MDT 2012
so you'll have to check for that.
var D = new Date().toString().split(' ')[(document.all)?3:4];
That will set D equal to the 24-hour HH:MM:SS string. Split that on the
colons, and the first element will be the hours.
var H = new Date().toString().split(' ')[(document.all)?3:4].split(':')[0];
You can convert 24-hour hours into 12-hour hours, but that hasn't
actually been mentioned here. Probably because it's fairly CRAZY
what you're actually doing mathematically when you convert hours
from clocks. In fact, what you're doing is adding 23, mod'ing that
by 12, and adding 1
twelveHour = ((twentyfourHour+23)%12)+1;
So, for example, you could grab the whole time from the date string, mod
the hours, and display all that with the new hours.
var T = new Date().toString().split(' ')[(document.all)?3:4].split(':');
T[0] = (((T[0])+23)%12)+1;
alert(T.join(':'));
With some smart regex, you can probably pull the hours off the HH:MM:SS
part of the date string, and mod them all in the same line. It would be
a ridiculous line because the backreference $1 couldn't be used in
calculations without putting a function in the replace.
Here's how that would look:
var T = new Date().toString().split(' ')[(document.all)?3:4].replace(/(^\d\d)/,function(){return ((parseInt(RegExp.$1)+23)%12)+1} );
Which, as I say, is ridiculous. If you're using a library that CAN perform
calculations on backreferences, the line becomes:
var T = new Date().toString().split(' ')[(document.all)?3:4].replace(/(^\d\d)/, (($1+23)%12)+1);
And that's not actually out of the question as useable code, if you document it well.
That line says:
Make a Date string, break it up on the spaces, get the browser-apropos part,
and replace the first two-digit-number with that number mod'ed.
Point of the story is, the way to convert 24-hour-clock hours to 12-hour-clock hours
is a non-obvious mathematical calculation:
You add 23, mod by 12, then add one more.
Here is a nice little function that worked for me.
function getDisplayDatetime() {
var d = new Date(); var hh = d.getHours(); var mm = d.getMinutes(); var dd = "AM"; var h = hh;
if (mm.toString().length == 1) {
mm = "0" + mm;
}
if (h >= 12) {
h = hh - 12;
dd = "PM";
}
if (h == 0) {
h = 12;
}
var Datetime = "Datetime: " + d.getFullYear() + "/" + (d.getMonth() + 1) + "/" + d.getUTCDate() + " " + h + ":" + mm;
return Datetime + " " + dd;
}
I noticed there is already an answer, but I wanted to share my own solution, using pure JavaScript:
function curTime(pm) {
var dt = new Date();
var hr = dt.getHours(), min = dt.getMinutes(), sec = dt.getSeconds();
var time = (pm ? ((hr+11)%12+1) : (hr<10?'0':'')+hr)+":"+(min<10?'0':'')+min+":"+(sec<10?'0':'')+sec+(pm ? (hr>12 ? " PM" : " AM") : "");
return time;
}
You can see it in action at https://jsfiddle.net/j2xk312m/3/ using the following code block:
(function() {
function curTime(pm) {
var dt = new Date();
var hr = dt.getHours(), min = dt.getMinutes(), sec = dt.getSeconds();
var time = (pm ? ((hr+11)%12+1) : (hr<10?'0':'')+hr)+":"+(min<10?'0':'')+min+":"+(sec<10?'0':'')+sec+(pm ? (hr>12 ? " PM" : " AM") : "");
return time;
}
alert("12-hour Format: "+curTime(true)+"\n24-hour Format: "+curTime(false));
})();
This way you have more control over the output - i.e - if you wanted the time format to be '4:30 pm' instead of '04:30 P.M.' - you can convert to whatever format you decide you want - and change it later too. Instead of being constrained to some old method that does not allow any flexibility.
and you only need to convert the first 2 digits as the minute and seconds digits are the same in 24 hour time or 12 hour time.
var my_time_conversion_arr = {'01':"01", '02':"02", '03':"03", '04':"04", '05':"05", '06':"06", '07':"07", '08':"08", '09':"09", '10':"10", '11':"11", '12': "12", '13': "1", '14': "2", '15': "3", '16': "4", '17': "5", '18': "6", '19': "7", '20': "8", '21': "9", '22': "10", '23': "11", '00':"12"};
var AM_or_PM = "";
var twenty_four_hour_time = "16:30";
var twenty_four_hour_time_arr = twenty_four_hour_time.split(":");
var twenty_four_hour_time_first_two_digits = twenty_four_hour_time_arr[0];
var first_two_twelve_hour_digits_converted = my_time_conversion_arr[twenty_four_hour_time_first_two_digits];
var time_strng_to_nmbr = parseInt(twenty_four_hour_time_first_two_digits);
if(time_strng_to_nmbr >12){
//alert("GREATER THAN 12");
AM_or_PM = "pm";
}else{
AM_or_PM = "am";
}
var twelve_hour_time_conversion = first_two_twelve_hour_digits_converted+":"+twenty_four_hour_time_arr[1]+" "+AM_or_PM;