A DateTime.ToString with CultureInfo("nb-NO") gives the wrong datetime string output on iOS

[rolfbjarne]

From @jfversluis on Mon, 03 Oct 2022 14:31:01 GMT

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Issue moved from dotnet/maui#10441

• Please respond to @sith-ikjetil.

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From @sith-ikjetil on Saturday, October 1, 2022 2:39:32 PM

Description

If you compile a .NET MAUI project for iOS, you get the wrong datetime format string for Norwegian output.
If you compile a .NET MAUI project for Windows or Android, you get the correct datetime format string for Norwegian output.

I use dotnet --version 6.0.401

Steps to Reproduce

1. Create a new .NET MAUI APP and compile for iOS.
2. Anywhere like in 'MauiProgram.cs' do something like:
3. var dt = DateTime.Now.ToString( new CultureInfo("nb-NO"));
4. dt will look like: 10/1/2022 4:00:28 PM
5. dt should look like: 01.10.2022 16:00:286

Link to public reproduction project repository

https://github.com/sith-ikjetil/maui-cultureinfo-no-bug

Version with bug

Unknown/Other (please specify)

Last version that worked well

Unknown/Other

Affected platforms

iOS

Affected platform versions

iOS 15.4

Did you find any workaround?

No response

Relevant log output

No response

Copied from original issue dotnet/macios#16217

[rolfbjarne]

From @jfversluis on Mon, 03 Oct 2022 14:31:02 GMT

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Issue moved from dotnet/maui#10441

• Please respond to @drasticactions.

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From @drasticactions on Monday, October 3, 2022 4:43:21 AM

I doubt this is an issue specific with MAUI (The UI Framework) and (probably) more to do with either the runtime or SDK.

@rolfbjarne @dalexsoto Does that sound correct?

[rolfbjarne]

From @jfversluis on Mon, 03 Oct 2022 14:31:04 GMT

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Issue moved from dotnet/maui#10441

• Please respond to @rolfbjarne.

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From @rolfbjarne on Monday, October 3, 2022 8:38:14 AM

Looks like this could be a duplicate of #68321.

@sith-ikjetil can you try printing out the current culture and see what you get?

Console.WriteLine ($"CurrentUICulture: {GetString (Thread.CurrentThread.CurrentUICulture)}");
Console.WriteLine ($"CurrentCulture: {GetString (Thread.CurrentThread.CurrentCulture)}");

static string GetString (CultureInfo ci)
{
	return $"Name: {ci.Name} NativeName: '{ci.NativeName}' DisplayName: '{ci.DisplayName}' EnglishName: '{ci.EnglishName}'";
}

[rolfbjarne]

From @jfversluis on Mon, 03 Oct 2022 14:31:05 GMT

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Issue moved from dotnet/maui#10441

• Please respond to @sith-ikjetil.

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From @sith-ikjetil on Monday, October 3, 2022 12:36:33 PM

CurrentUICulture: Name: nb-US NativeName: 'nb (US)' DisplayName: 'nb (US)' EnglishName: 'nb (US)'
CurrentCulture: Name: nb-US NativeName: 'nb (US)' DisplayName: 'nb (US)' EnglishName: 'nb (US)'

@rolfbjarne This is what i got.

[rolfbjarne]

From @sith-ikjetil on Mon, 03 Oct 2022 14:39:40 GMT

I would like to point out that I forward a CultureInfo(“nb-NO”) to DateTime ToString method, so the current thread culture and uiculture should not matter. FYI.

[rolfbjarne]

From @rolfbjarne on Tue, 04 Oct 2022 08:32:27 GMT

Looks like we're not shipping culture info at all for Norwegian (nor a bunch of other languages).

These languages do not show in CultureInfo.GetCultures (CultureTypes.AllCultures).

Some test code: https://gist.github.com/rolfbjarne/cd23c871acb6bfd6fab9acb75c285fa3#file-appdelegate-cs

Shows that there are 238 cultures for Mac Catalyst (and likely the same for iOS and tvOS), while there are 940 cultures for macOS - including Norwegian (and the date is also formatted as expected)

The culture data is shipped from the runtime, so I'm moving this bug there.

Tagging subscribers to this area: @dotnet/area-system-globalization
See info in area-owners.md if you want to be subscribed.

Issue Details

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From @jfversluis on Mon, 03 Oct 2022 14:31:01 GMT

---

Issue moved from dotnet/maui#10441

• Please respond to @sith-ikjetil.

---

From @sith-ikjetil on Saturday, October 1, 2022 2:39:32 PM

Description

If you compile a .NET MAUI project for iOS, you get the wrong datetime format string for Norwegian output.
If you compile a .NET MAUI project for Windows or Android, you get the correct datetime format string for Norwegian output.

I use dotnet --version 6.0.401

Steps to Reproduce

1. Create a new .NET MAUI APP and compile for iOS.
2. Anywhere like in 'MauiProgram.cs' do something like:
3. var dt = DateTime.Now.ToString( new CultureInfo("nb-NO"));
4. dt will look like: 10/1/2022 4:00:28 PM
5. dt should look like: 01.10.2022 16:00:286

Link to public reproduction project repository

https://github.com/sith-ikjetil/maui-cultureinfo-no-bug

Version with bug

Unknown/Other (please specify)

Last version that worked well

Unknown/Other

Affected platforms

iOS

Affected platform versions

iOS 15.4

Did you find any workaround?

No response

Relevant log output

No response

Copied from original issue dotnet/macios#16217

Author:	rolfbjarne
Assignees:	-
Labels:	area-System.Globalization
Milestone:	-

[rolfbjarne]

CC @steveisok @akoeplinger

[Clockwork-Muse]

Culture info usually comes from the OS, via the ICU. Is that not the case here?

[ufcpp]

Invariant Mode?

Tagging subscribers to 'os-ios': @steveisok, @akoeplinger
See info in area-owners.md if you want to be subscribed.

Issue Details

---

From @jfversluis on Mon, 03 Oct 2022 14:31:01 GMT

---

Issue moved from dotnet/maui#10441

• Please respond to @sith-ikjetil.

---

From @sith-ikjetil on Saturday, October 1, 2022 2:39:32 PM

Description

If you compile a .NET MAUI project for iOS, you get the wrong datetime format string for Norwegian output.
If you compile a .NET MAUI project for Windows or Android, you get the correct datetime format string for Norwegian output.

I use dotnet --version 6.0.401

Steps to Reproduce

1. Create a new .NET MAUI APP and compile for iOS.
2. Anywhere like in 'MauiProgram.cs' do something like:
3. var dt = DateTime.Now.ToString( new CultureInfo("nb-NO"));
4. dt will look like: 10/1/2022 4:00:28 PM
5. dt should look like: 01.10.2022 16:00:286

Link to public reproduction project repository

https://github.com/sith-ikjetil/maui-cultureinfo-no-bug

Version with bug

Unknown/Other (please specify)

Last version that worked well

Unknown/Other

Affected platforms

iOS

Affected platform versions

iOS 15.4

Did you find any workaround?

No response

Relevant log output

No response

Copied from original issue dotnet/macios#16217

Author:	rolfbjarne
Assignees:	mkhamoyan
Labels:	area-System.Globalization, untriaged, os-ios
Milestone:	-