1 files changed, 17 insertions, 0 deletions
diff --git a/src/mscorlib/corefx/System/Globalization/CalendarWeekRule.cs b/src/mscorlib/corefx/System/Globalization/CalendarWeekRule.cs
new file mode 100644
index 0000000000..08ad32b9cd
--- /dev/null
+++ b/src/mscorlib/corefx/System/Globalization/CalendarWeekRule.cs
@@ -0,0 +1,17 @@
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System;
+
+namespace System.Globalization
+{
+    [System.Runtime.InteropServices.ComVisible(true)]
+    public enum CalendarWeekRule
+    {
+        FirstDay = 0,           // Week 1 begins on the first day of the year
+
+        FirstFullWeek = 1,      // Week 1 begins on first FirstDayOfWeek not before the first day of the year
+
+        FirstFourDayWeek = 2    // Week 1 begins on first FirstDayOfWeek such that FirstDayOfWeek+3 is not before the first day of the year        
+    };
+}