DateTime Format In C#

C# DateTime Format

Date and Time in C# are handled by the DateTime class in C#, which provides properties and methods to format dates in different datetime formats. This article blog explains how to work with date and time format in C#.

The following table describes various C# DateTime formats and their results. Here we see all the patterns of the C# DateTime, format, and results.

Format Result
DateTime.Now.ToString("MM/dd/yyyy") 05/29/2015
DateTime.Now.ToString("dddd, dd MMMM yyyy") Friday, 29 May 2015
DateTime.Now.ToString("dddd, dd MMMM yyyy") Friday, 29 May 2015 05:50
DateTime.Now.ToString("dddd, dd MMMM yyyy") Friday, 29 May 2015 05:50 AM
DateTime.Now.ToString("dddd, dd MMMM yyyy") Friday, 29 May 2015 5:50
DateTime.Now.ToString("dddd, dd MMMM yyyy") Friday, 29 May 2015 5:50 AM
DateTime.Now.ToString("dddd, dd MMMM yyyy HH:mm:ss") Friday, 29 May 2015 05:50:06
DateTime.Now.ToString("MM/dd/yyyy HH:mm") 05/29/2015 05:50
DateTime.Now.ToString("MM/dd/yyyy hh:mm tt") 05/29/2015 05:50 AM
DateTime.Now.ToString("MM/dd/yyyy H:mm") 05/29/2015 5:50
DateTime.Now.ToString("MM/dd/yyyy h:mm tt") 05/29/2015 5:50 AM
DateTime.Now.ToString("MM/dd/yyyy HH:mm:ss") 05/29/2015 05:50:06
DateTime.Now.ToString("MMMM dd") May 29
DateTime.Now.ToString("yyyy’-‘MM’-‘dd’T’HH’:’mm’:’ss.fffffffK") 2015-05-16T05:50:06.7199222-04:00
DateTime.Now.ToString("ddd, dd MMM yyy HH’:’mm’:’ss ‘GMT’") Fri, 16 May 2015 05:50:06 GMT
DateTime.Now.ToString("yyyy’-‘MM’-‘dd’T’HH’:’mm’:’ss") 2015-05-16T05:50:06
DateTime.Now.ToString("HH:mm") 05:50
DateTime.Now.ToString("hh:mm tt") 05:50 AM
DateTime.Now.ToString("H:mm") 5:50
DateTime.Now.ToString("h:mm tt") 5:50 AM
DateTime.Now.ToString("HH:mm:ss") 05:50:06
DateTime.Now.ToString("yyyy MMMM") 2015 May
  • d: Represents the day of the month as a number from 1 through 31.
  • dd: Represents the day of the month as a number from 01 through 31.
  • ddd: Represents the abbreviated name of the day (Mon, Tues, Wed, etc).
  • dddd: Represents the full name of the day (Monday, Tuesday, etc).
  • h: 12-hour clock hour (e.g. 4).
  • hh: 12-hour clock, with a leading 0 (e.g. 06)
  • H: 24-hour clock hour (e.g. 15)
  • HH: 24-hour clock hour, with a leading 0 (e.g. 22)
  • m: Minutes
  • mm: Minutes with a leading zero
  • M: Month number(eg.3)
  • MM: Month number with leading zero(eg.04)
  • MMM: Abbreviated Month Name (e.g. Dec)
  • MMMM: Full month name (e.g. December)
  • s: Seconds
  • ss: Seconds with leading zero
  • t: Abbreviated AM / PM (e.g. A or P)
  • tt: AM / PM (e.g. AM or PM
  • y: Year, no leading zero (e.g. 2015 would be 15)
  • yy: Year, leading zero (e.g. 2015 would be 015)
  • yyy: Year, (e.g. 2015)
  • yyyy: Year, (e.g. 2015)
  • K: Represents the time zone information of a date and time value (e.g. +05:00)
  • z: With DateTime values represent the signed offset of the local operating system's time zone from
    Coordinated Universal Time (UTC), measured in hours. (e.g. +6)
  • zz: As z, but with leading zero (e.g. +06)
  • zzz: With DateTime values represents the signed offset of the local operating system's time zone from UTC, measured in hours and minutes. (e.g. +06:00)
  • f: Represents the most significant digit of the seconds fraction; that is, it represents the tenths of a second in a date and time value.
  • ff: Represents the two most significant digits of the second's fraction in date and time
  • fff: Represents the three most significant digits of the second's fraction; that is, it represents the milliseconds in a date and time value.
  • ffff: Represents the four most significant digits of the second's fraction; that is, it represents the ten-thousandths of a second in a date and time value. While it is possible to display the ten thousandths of a second component of a time value, that value may not be meaningful.
  • fffff: Represents the five most significant digits of the second's fraction; that is, it represents the hundred-thousandths of a second in a date and time value.
  • ffffff: Represents the six most significant digits of the second's fraction; that is, it represents the millionths of a second in a date and time value.
  • fffffff: Represents the seven most significant digits of the second's fraction; that is, it represents the ten-millionths of a second in a date and time value.

Here is a complete C# code sample that uses these formats.

using System;  
  
namespace DateTimeFormatInCSharpSample  
{  
    class Program  
    {  
        static void Main(string[] args)  
        {  
            // Get current DateTime. It can be any DateTime object in your code.  
            DateTime aDate = DateTime.Now;  
  
            // Format Datetime in different formats and display them  
            Console.WriteLine(aDate.ToString("MM/dd/yyyy"));  
            Console.WriteLine(aDate.ToString("dddd, dd MMMM yyyy"));  
            Console.WriteLine(aDate.ToString("dddd, dd MMMM yyyy"));  
            Console.WriteLine(aDate.ToString("dddd, dd MMMM yyyy"));  
            Console.WriteLine(aDate.ToString("dddd, dd MMMM yyyy"));  
            Console.WriteLine(aDate.ToString("dddd, dd MMMM yyyy"));  
            Console.WriteLine(aDate.ToString("dddd, dd MMMM yyyy HH:mm:ss"));  
            Console.WriteLine(aDate.ToString("MM/dd/yyyy HH:mm"));  
            Console.WriteLine(aDate.ToString("MM/dd/yyyy hh:mm tt"));  
            Console.WriteLine(aDate.ToString("MM/dd/yyyy H:mm"));  
            Console.WriteLine(aDate.ToString("MM/dd/yyyy h:mm tt"));  
            Console.WriteLine(aDate.ToString("MM/dd/yyyy HH:mm:ss"));  
            Console.WriteLine(aDate.ToString("MMMM dd"));  
            Console.WriteLine(aDate.ToString("yyyy’-‘MM’-‘dd’T’HH’:’mm’:’ss.fffffffK"));  
            Console.WriteLine(aDate.ToString("ddd, dd MMM yyy HH’:’mm’:’ss ‘GMT’"));  
            Console.WriteLine(aDate.ToString("yyyy’-‘MM’-‘dd’T’HH’:’mm’:’ss"));  
            Console.WriteLine(aDate.ToString("HH:mm"));  
            Console.WriteLine(aDate.ToString("hh:mm tt"));  
            Console.WriteLine(aDate.ToString("H:mm"));  
            Console.WriteLine(aDate.ToString("h:mm tt"));  
            Console.WriteLine(aDate.ToString("HH:mm:ss"));  
            Console.WriteLine(aDate.ToString("yyyy MMMM"));  
  
            Console.ReadKey();  
        }  
    }  
}

Above code sample generates the following output.

CSharp DateTime

Here is a detailed tutorial on DateTime and formatting: Working with DateTime In C#

Learn about DateTime Class in C#

Calculate the Date Difference in C#

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