Ädded remaining customized date/time formats for Persian calendar, and extracted them into a separate class.

src/Orchard/Localization/Services/CultureDateTimeFormatProvider.cs

@@ -174,7 +174,7 @@ namespace Orchard.Localization.Services {
 
         public virtual string[] AmPmDesignators {
             get {
-                return new [] { DateTimeFormat.AMDesignator, DateTimeFormat.PMDesignator };
+                return new[] { DateTimeFormat.AMDesignator, DateTimeFormat.PMDesignator };
             }
         }
 
@@ -208,30 +208,7 @@ namespace Orchard.Localization.Services {
                     // "orphaned" (i.e. not supported for any culture!) in the .NET Framework, something generally
                     // considered a serious bug, I think it's justified to add this particular override
                     if (culture.Name == "fa-IR" && calendar is PersianCalendar) {
-                        var persianFormats = (DateTimeFormatInfo)culture.DateTimeFormat.Clone();
-                        var persianCalendarMonthNames = new[] {
-                            "فررودين",
-                            "ارديبهشت",
-                            "خرداد",
-                            "تير",
-                            "مرداد",
-                            "شهريور",
-                            "مهر",
-                            "آبان",
-                            "آذر",
-                            "دي",
-                            "بهمن",
-                            "اسفند",
-                            "" // 13 months names always necessary...
-                        };
-
-                        persianFormats.MonthNames = 
-                            persianFormats.AbbreviatedMonthNames = 
-                            persianFormats.MonthGenitiveNames = 
-                            persianFormats.AbbreviatedMonthGenitiveNames = 
-                            persianCalendarMonthNames;
-
-                        return persianFormats;
+                        return PersianDateTimeFormatInfo.Build(culture.DateTimeFormat);
                     }
                 }
 

src/Orchard/Localization/Services/PersianDateTimeFormatInfo.cs

@@ -0,0 +1,69 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Orchard.Localization.Services {
+    internal static class PersianDateTimeFormatInfo {
+        internal static DateTimeFormatInfo Build(DateTimeFormatInfo original) {
+            var persianFormats = (DateTimeFormatInfo)original.Clone();
+
+            var persianCalendarMonthNames = new[] {
+                "فررودين",
+                "ارديبهشت",
+                "خرداد",
+                "تير",
+                "مرداد",
+                "شهريور",
+                "مهر",
+                "آبان",
+                "آذر",
+                "دي",
+                "بهمن",
+                "اسفند",
+                "" // 13 months names always necessary...
+            };
+
+            persianFormats.MonthNames =
+                persianFormats.AbbreviatedMonthNames =
+                persianFormats.MonthGenitiveNames =
+                persianFormats.AbbreviatedMonthGenitiveNames =
+                persianCalendarMonthNames;
+
+            persianFormats.SetAllDateTimePatterns(new[] {
+                "yyyy/MM/dd",
+                "yy/MM/dd",
+                "yyyy/M/d",
+                "yy/M/d"
+            }, 'd');
+
+            persianFormats.SetAllDateTimePatterns(new[] {
+                "dddd، d MMMM yyyy",
+                "d MMMM yyyy"
+            }, 'D');
+
+            persianFormats.SetAllDateTimePatterns(new[] {
+                "MMMM yyyy",
+                "MMMM yy"
+            }, 'y');
+
+            persianFormats.SetAllDateTimePatterns(new[] {
+                "HH:mm",
+                "H:mm",
+                "hh:mm tt",
+                "h:mm tt"
+            }, 't');
+
+            persianFormats.SetAllDateTimePatterns(new[] {
+                "HH:mm:ss",
+                "H:mm:ss",
+                "hh:mm:ss tt",
+                "h:mm:ss tt"
+            }, 'T');
+
+            return persianFormats;
+        }
+    }
+}

src/Orchard/Orchard.Framework.csproj

@@ -278,6 +278,7 @@
     <Compile Include="Localization\Services\IDateFormatter.cs" />
     <Compile Include="Localization\Services\IDateTimeFormatProvider.cs" />
     <Compile Include="Localization\Services\ILocalizedStringManager.cs" />
+    <Compile Include="Localization\Services\PersianDateTimeFormatInfo.cs" />
     <Compile Include="Localization\Services\SiteCalendarSelector.cs" />
     <Compile Include="Logging\OrchardFileAppender.cs" />
     <Compile Include="Logging\OrchardLog4netFactory.cs" />