How to Convert Date/Time from 24-Hour Format to 12-Hour Am/Pm

Javascript: convert 24-hour time-of-day string to 12-hour time with AM/PM and no timezone

Nothing built in, my solution would be as follows :

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.join (''); // return adjusted time or original string
}

tConvert ('18:00:00');

This function uses a regular expression to validate the time string and to split it into its component parts. Note also that the seconds in the time may optionally be omitted.
If a valid time was presented, it is adjusted by adding the AM/PM indication and adjusting the hours.

The return value is the adjusted time if a valid time was presented or the original string.

Working example

(function() {
  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.join(''); // return adjusted time or original string  }
  var tel = document.getElementById('tests');
  tel.innerHTML = tel.innerHTML.split(/\r*\n|\n\r*|\r/).map(function(v) {    return v ? v + ' => "' + tConvert(v.trim()) + '"' : v;  }).join('\n');})();

<h3>tConvert tests : </h3><pre id="tests">  18:00:00  18:00  00:00  11:59:01  12:00:00  13:01:57  24:00  sdfsdf  12:61:54</pre>

Converting 24 hour time to 12 hour time w/ AM & PM using Javascript

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"));

How do I convert date/time from 24-hour format to 12-hour AM/PM?

I think you can use date() function to achive this

$date = '19:24:15 06/13/2013'; 
echo date('h:i:s a m/d/Y', strtotime($date));

This will output

07:24:15 pm 06/13/2013

Live Sample

h is used for 12 digit time

i stands for minutes

s seconds

a will return am or pm (use in uppercase for AM PM)

m is used for months with digits

d is used for days in digit

Y uppercase is used for 4 digit year (use it lowercase for two digit)

Updated

This is with DateTime

$date = new DateTime('19:24:15 06/13/2013');
echo $date->format('h:i:s a m/d/Y') ;

Live Sample

How to Convert Time from 24 hour format to 12 hour format (AM/PM) with Pandas (Python)

Try with .dt instead of .datetime per your last line of code

df['start'] = pd.to_datetime(df['start']).dt.strftime('%I:%M %p')

https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.Series.dt.html

How can I convert 24 hour time to 12 hour time?

>>> from datetime import datetime
>>> d = datetime.strptime("10:30", "%H:%M")
>>> d.strftime("%I:%M %p")
'10:30 AM'
>>> d = datetime.strptime("22:30", "%H:%M")
>>> d.strftime("%I:%M %p")
'10:30 PM'

Display current time in 12 hour format with AM/PM

Easiest way to get it by using date pattern - h:mm a, where

• h - Hour in am/pm (1-12)
• m - Minute in hour
• a - Am/pm marker

Code snippet :

DateFormat dateFormat = new SimpleDateFormat("hh:mm a");

Read more on documentation - SimpleDateFormat java 7

How to convert character date time if time mixed between 12 hour and 24 hour time?

Try lubridate, it is a very robust package for dates and times:

library(lubridate)

ymd_hms(c("2019-01-20 10:25:00 PM", "2019-01-20 22:25:00"))
[1] "2019-01-20 22:25:00 UTC" "2019-01-20 22:25:00 UTC"

Check ?ymd_hms for more options.

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