Difference output between Linux and Windows platforms

[SerhiiS-in6k]

Hello. This line
string.Format("{0:G}", new DateTime(2015, 9, 14, 8, 30, 0))
On Linux return
9/14/15 8:30:00 AM
On Windows
9/14/2015 8:30:00 AM
I my case it is cause a problem because the tests are not passed between platform.

[SerhiiS-in6k]

You can check this simple example https://github.com/SerhiiS-in6k/DotNetCoreTest/blob/master/DotNetCoreConsoleApplication/Program.cs

[SerhiiS-in6k]

Expected format:
String.Format("{0:G}", dt); // "3/9/2008 4:05:07 PM"
Example
http://www.csharp-examples.net/string-format-datetime/

[SerhiiS-in6k]

Same problem with ToString("d") method

[Jupakabra]

Are your thread cultures the same on both environments?

[SerhiiS-in6k]

I think it doesn't matter because "{0:G}" pattern should return "3/9/2008 4:05:07 PM"

[Clockwork-Muse]

@SerhiiS-in6k - does matter, the formatting pattern is culture aware.

[SerhiiS-in6k]

I run

CultureInfo culture = CultureInfo.CurrentCulture; Console.WriteLine("The current culture is {0} [{1}]", culture.NativeName, culture.Name);
Output on both system(Linux and Windows) :
The current culture is English (United States) [en-US]

[SerhiiS-in6k]

Do you know the way to set culture info because of this code
DateTime date1 = new DateTime(2008, 4, 10); Console.WriteLine(date1.ToString("D", CultureInfo.CreateSpecificCulture("en-US")));
doesn't work with .Net Core

[svick]

@SerhiiS-in6k

You can use the CultureInfo(string) constructor:

Console.WriteLine(date1.ToString("D", new CultureInfo("en-US")));

[stephentoub]

@steveharter or @tarekgh, could you take a look at this one? I'm able to repro, and it does look like we're using the wrong format.

[tarekgh]

This is happening because the default short date for en-US (on Linux) is M/d/yy. the way determine the default short date is the code

https://github.com/dotnet/coreclr/blob/master/src/corefx/System.Globalization.Native/calendarData.cpp#L527

https://github.com/dotnet/coreclr/blob/master/src/corefx/System.Globalization.Native/calendarData.cpp#L281

the default short date pattern used is the first one returned from this enumeration and it looks that what ICU return for KShort

CC @eerhardt

[danmoseley]

@tarekgh @eerhardt is there a bug here or action required? If not please close.

[tarekgh]

@SerhiiS-in6k it is expected to have differences between the OS's in general. I am closing this issue but if you disagree with the default short date format we are picking on Linux then please re-open the issue. I just want to make sure it is clear we expect different formats on different OS's. Thanks.