Convert DateTime To Custom String Format

In this article, you can learn how to Convert DateTime To Custom String Format. Also, learn how to format Date and time with a separator.

Convert DateTime To Custom String Format | String Format for DateTime

Below are the example for custom format specifiers y (year), M (month), d (day), h (hour 12), H (hour 24), m (minute), s (second), f (second fraction), F (second fraction, trailing zeroes are trimmed), t (P.M or A.M) and z (time zone).

DateTime dt = new DateTime(2022, 3, 9, 16, 5, 7, 123);

String.Format("{0:y yy yyy yyyy}", dt);  // "8 08 008 2022"   year
String.Format("{0:M MM MMM MMMM}", dt);  // "3 03 Mar March"  month
String.Format("{0:d dd ddd dddd}", dt);  // "9 09 Sun Sunday" day
String.Format("{0:h hh H HH}",     dt);  // "4 04 16 16"      hour 12/24
String.Format("{0:m mm}",          dt);  // "5 05"            minute
String.Format("{0:s ss}",          dt);  // "7 07"            second
String.Format("{0:f ff fff ffff}", dt);  // "1 12 123 1230"   sec.fraction
String.Format("{0:F FF FFF FFFF}", dt);  // "1 12 123 123"    without zeroes
String.Format("{0:t tt}",          dt);  // "P PM"            A.M. or P.M.
String.Format("{0:z zz zzz}",      dt);  // "-6 -06 -06:00"   time zone

Date(/) and Time(:) separator examples:

using System;  
String.Format("{0:d/M/yyyy HH:mm:ss}", dt); // "9/3/2022 16:05:07" - english (en-US)

Custom date and time formatting:

// month/day numbers without/with leading zeroes
String.Format("{0:M/d/yyyy}", dt);            // "3/9/2022"
String.Format("{0:MM/dd/yyyy}", dt);          // "03/09/2022"

// day/month names
String.Format("{0:ddd, MMM d, yyyy}", dt);    // "Sun, Mar 9, 2022"
String.Format("{0:dddd, MMMM d, yyyy}", dt);  // "Sunday, March 9, 2022"

// two/four digit year
String.Format("{0:MM/dd/yy}", dt);            // "03/09/22"
String.Format("{0:MM/dd/yyyy}", dt);          // "03/09/2022"

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