DateTime ToString output with months of formatting using the "mm" qualifier

Question

I have a problem getting the correct format. I expect "2013/10", but instead I get "2013/00".

Why is this and how can I fix it?

DateTime dt = DateTime.Parse("2013-Oct-01"); string str2 = dt.ToString("yyyy/mm"); 

Answer 1

mm is the minute, and mm is the month.

 DateTime dt = DateTime.Parse("2013-Oct-01"); string str2 = dt.ToString("yyyy/MM"); 

See the MSDN article DateTime.ToString méthode (String) .

For a more complete list:

 // Create date time 2008-03-09 16:05:07.123 DateTime dt = new DateTime(2008, 3, 9, 16, 5, 7, 123); String.Format("{0:y yy yyy yyyy}", dt); // "8 08 008 2008" 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" AM or PM String.Format("{0:z zz zzz}", dt); // "-6 -06 -06:00" time zone 

Answer 2

mm - minutes. You need to use mm , which is several months:

 var str2 = dt.ToString("yyyy/MM"); 

Answer 3

mm - minutes. mm - month. You are using the wrong field.