[C#] Format DateTime as String Examples

Some examples and tips on C# DateTime formatting using string.Format() or .ToString() methods.

Standard DateTime format

Standard formats are typically used when you need a fast string representation of your DateTime object based on current culture.

DateTime date = DateTime.Now;
// Short date:
string.Format("{0:d}", date)   // 3/26/2025
// Long date:
string.Format("{0:D}", date)   // Wednesday, March 26, 2025 
// Short time:
string.Format("{0:t}", date)   // 9:42 AM
// Long time:
string.Format("{0:T}", date)   // 9:42:39 AM
// Full date/time (short time):
string.Format("{0:f}", date)   // Wednesday, March 26, 2025 9:42 AM
// Full date/time (long time):
string.Format("{0:F}", date)   // Wednesday, March 26, 2025 9:42:39 AM
// General  date/time (long time):
string.Format("{0:g}", date)   // 3/26/2025 9:42 AM
// General  date/time (long time):
string.Format("{0:G}", date)   // 3/26/2025 9:42:39 AM
// Sortable date/time:
string.Format("{0:s}", date)   // 2025-03-26T09:42:39

Custom DateTime format

Custom formats are useful when you need more flexibility on the output string format.

DateTime date = DateTime.Now;
string.Format("{0:MM/dd/yyyy}", date)   // 03/26/2025
string.Format("{0:MMMM dd, yyyy}", date)// March 26, 2025
string.Format("{0:MMM yyyy}", date)     // Mar 2025
string.Format("{0:hh:mm tt}", date)     // 09:42 AM

// Year patterns:
string.Format("{0:yy yyy yyyy}", date)  // 25 2025 2025
// Month patterns:
string.Format("{0:MM MMM MMMM}", date)  // 03 Mar March
// Day patterns:
string.Format("{0:dd ddd dddd}", date)  // 26 Wed Wednesday
// Hour
string.Format("{0:hh HH tt}", date)     // 09 09 AM
// Minute, second, second fraction 
string.Format("{0:mm ss ffff}", date)   // 42 39 8103

Format DateTime for a specific culture

When you format a DateTime with DateTime.ToString() you can also specify the culture to use.


using System.Globalization;
// ...
DateTime date = DateTime.Now;
// InvariantCulture 
CultureInfo invC = CultureInfo.InvariantCulture;
date.ToString("f", invC)        // Wednesday, 26 March 2025 09:42 
date.ToString("d", invC)        // 03/26/2025 
date.ToString("t", invC)        // 09:42 
// German CultureInfo 
CultureInfo deC = new CultureInfo("de-De");
date.ToString("f", deC)        // Mittwoch, 26. März 2025 09:42 
date.ToString("d", deC)        // 26.03.2025 
date.ToString("t", deC)        // 09:42 
// French CultureInfo 
CultureInfo frC = new CultureInfo("fr-FR");
date.ToString("f", frC)        // mercredi 26 mars 2025 09:42 
date.ToString("d", frC)        // 26/03/2025 
date.ToString("t", frC)        // 09:42 
// Spanish CultureInfo 
CultureInfo esC = new CultureInfo("es-ES");
date.ToString("f", esC)        // miércoles, 26 de marzo de 2025 9:42 
date.ToString("d", esC)        // 26/03/2025 
date.ToString("t", esC)        // 9:42

Character escape and text

Any characters not used by the formatter is reported in the result string. If you need to enter text with reserved characters that must be inserted between two ' (single quote).

DateTime date = DateTime.Now;
// Escaped date text
string.Format("{0:'y:' yyyy' m:' M 'd:' d}", date)  // y: 2025 m: 3 d: 26 
// Force time format to use ':' as separator ()
string.Format("{0:HH':'mm}", date)                  // 09:42

TOOL: Test you format string

A simple tool for test your format string.