Convert AM/PM time to 24 hours format?

Question

I need to convert 12 hours format time (am/pm) to 24 hours format time, e.g. 01:00 PM to 13:00 using C#. How can I convert it?

What is the type of the format? Do you want toi cas a string or a DateTime? — JiBéDoublevé, Dec 01 '11 at 07:02
`DateTime` doesn't have such thing like format. Its applied only when you're using `ToString`, so are your variables of type `string` ? — Piotr Auguscik, Dec 01 '11 at 07:03
`HH` should get you the 24 hr format, but what is getting converted to what is the question — V4Vendetta, Dec 01 '11 at 07:06
@Piotr Auguscik when i use ToString() it returns 1:00:00 PM but i need 13:00:00 — nmathur, Dec 01 '11 at 07:06
@nmathur check what bobbymcr has suggested it should work for you — V4Vendetta, Dec 01 '11 at 07:11
@nmathur Check bobbymcr's answer, its all what you need. Your server must have defined enviroment variables telling him to convert `DateTime` to 12 hours format. So you have to change server setting or force the format you prefer everywhere where `tostring` is called — Piotr Auguscik, Dec 01 '11 at 07:12
@phoog it is a String and when i convert it into DateTime AM or PM remains in Date. — nmathur, Dec 01 '11 at 07:16
@V4Vendetta thanks pal, HH worked .. :) and thank you all for you suggestions. — nmathur, Dec 01 '11 at 07:19
@nmathur It seems hard for you to tell what is the `Type` where the date and time are stored... Do you need to convert a `string` *"4 PM"* into another `string` "*16:00*" or do you want to print a `DateTime` in the format you want? — JiBéDoublevé, Dec 01 '11 at 09:17
Try putting more effort into formulating your question. Use formatting, give examples, etc. — markus, Dec 01 '11 at 13:23

Marco · Answer 1 · 2011-12-01T07:09:18.827

39

If you need to convert a string to a DateTime you could try

DateTime dt = DateTime.Parse("01:00 PM"); // No error checking

or (with error checking)

DateTime dt;
bool res = DateTime.TryParse("01:00 PM", out dt);

Variable dt contains your datetime, so you can write it

dt.ToString("HH:mm");

Last one works for every DateTime var you have, so if you still have a DateTime, you can write it out in this way.

edited Dec 01 '11 at 07:09

answered Dec 01 '11 at 07:03

Marco

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for the last one: No overload method ToString takes one argument – reaz Apr 07 '16 at 16:05

score 19 · Answer 2 · answered Dec 01 '11 at 07:05

19

You'll want to become familiar with Custom Date and Time Format Strings.

DateTime localTime = DateTime.Now;

// 24 hour format -- use 'H' or 'HH'
string timeString24Hour = localTime.ToString("HH:mm", CultureInfo.CurrentCulture);

answered Dec 01 '11 at 07:05

bobbymcr

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score 14 · Answer 3 · answered Mar 28 '16 at 10:52

14

Convert a string to a DateTime, you could try

    DateTime timeValue = Convert.ToDateTime("01:00 PM");
    Console.WriteLine(timeValue.ToString("HH:mm"));

answered Mar 28 '16 at 10:52

Pratyush

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This answer can also convert Nullable format.. nice.. – Maulana iman Mar 17 '20 at 10:00

Praveen Gopal · Answer 4 · 2020-01-24T07:46:39.107

6

You can use like this:

string date = "";

date = DateTime.ParseExact("01:00 PM" , "h:mm tt", CultureInfo.InvariantCulture).ToString("HH:mm");

h: 12 hours

mm: mins

tt: PM/AM

HH:24 hours

edited Jan 24 '20 at 07:46

answered Aug 22 '17 at 10:24

Praveen Gopal

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score 6 · Answer 5 · answered Dec 01 '11 at 07:05

6

int hour = your hour value;
int min = your minute value;
String ampm = your am/pm value;

hour = ampm == "AM" ? hour : (hour % 12) + 12; //convert 12-hour time to 24-hour

var dateTime = new DateTime(0,0,0, hour, min, 0);
var timeString = dateTime.ToString("HH:mm");

answered Dec 01 '11 at 07:05

Haris Hasan

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for AM, should be `(hour % 12)` – T.S. Oct 18 '16 at 21:16

score 6 · Answer 6 · answered Dec 01 '11 at 07:14

Go through following code to convert the DateTime from 12 hrs to 24 hours.

string currentDateString = DateTime.Now.ToString("dd-MMM-yyyy h:mm tt");
DateTime currentDate = Convert.ToDateTime(currentDateString);
Console.WriteLine("String Current Date: " + currentDateString);
Console.WriteLine("Converted Date: " + currentDate.ToString("dd-MMM-yyyy HH:mm"));

Whenever you want the time should be displayed in24 hours use format "HH"

You can refer following link for further details: Custom Date and Time Format Strings

score 1 · Answer 7 · answered Feb 17 '20 at 17:40

using System;

class Solution
{
    static string timeConversion(string s)
    {
        return DateTime.Parse(s).ToString("HH:mm");
    }

    static void Main(string[] args)
    {
        Console.WriteLine(timeConversion("01:00 PM"));
        Console.Read();
    }
}

score 0 · Answer 8 · edited Jan 18 '22 at 23:25

0

using System;

public class Program
{
    public static string ConvertFrom12To24HoursFormat(string inputTime)
    {
        return DateTime.Parse(inputTime).ToString("hh:mm");
    }

    public static void Main(string[] args)
    {
        Console.WriteLine(ConvertFrom12To24HoursFormat("01:05 pm"));
    }
}

edited Jan 18 '22 at 23:25

Chris Catignani

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answered Jan 18 '22 at 22:57

Ricardo O.

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score 0 · Answer 9 · edited May 23 '17 at 12:18

0

You can use the ParseExact() method to obtain a DateTime object. You can then use the ToString() method of that DateTime object to convert the string to what ever you need as shown here.

edited May 23 '17 at 12:18

Community

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answered Dec 01 '11 at 07:06

npinti

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okrumnow · Answer 10 · 2011-12-01T07:16:01.967

-1

You may use Cultures to parse and format your string, eg

var cultureSource = new CultureInfo("en-US", false);
var cultureDest = new CultureInfo("de-DE", false);

var source = "01:00 pm";

var dt = DateTime.Parse(source, cultureSource);
Console.WriteLine(dt.ToString("t", cultureDest));

This prints 13:00

edited Dec 01 '11 at 07:16

answered Dec 01 '11 at 07:08

okrumnow

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Convert AM/PM time to 24 hours format?

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