diff --git a/src/NzbDrone.Common/DateTimeExtensions.cs b/src/NzbDrone.Common/DateTimeExtensions.cs
deleted file mode 100644
index 8b2ba6491..000000000
--- a/src/NzbDrone.Common/DateTimeExtensions.cs
+++ /dev/null
@@ -1,24 +0,0 @@
-using System;
-using System.Globalization;
-
-namespace NzbDrone.Common
-{
-    public static class DateTimeExtensions
-    {
-        public static DateTime GetFirstDayOfWeek(this DateTime dayInWeek)
-        {
-            var defaultCultureInfo = CultureInfo.CurrentCulture;
-            return GetFirstDayOfWeek(dayInWeek, defaultCultureInfo);
-        }
-
-        public static DateTime GetFirstDayOfWeek(this DateTime dayInWeek, CultureInfo cultureInfo)
-        {
-            DayOfWeek firstDay = cultureInfo.DateTimeFormat.FirstDayOfWeek;
-            DateTime firstDayInWeek = dayInWeek.Date;
-            while (firstDayInWeek.DayOfWeek != firstDay)
-                firstDayInWeek = firstDayInWeek.AddDays(-1);
-
-            return firstDayInWeek;
-        }
-    }
-}
diff --git a/src/NzbDrone.Common/EnvironmentInfo/OsInfo.cs b/src/NzbDrone.Common/EnvironmentInfo/OsInfo.cs
index 16894f00c..bdd7c14ac 100644
--- a/src/NzbDrone.Common/EnvironmentInfo/OsInfo.cs
+++ b/src/NzbDrone.Common/EnvironmentInfo/OsInfo.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Globalization;
 using System.Runtime.InteropServices;
 
 namespace NzbDrone.Common.EnvironmentInfo
@@ -18,7 +19,7 @@ namespace NzbDrone.Common.EnvironmentInfo
             IsLinux = IsMono && !IsOsx;
             IsWindows = !IsMono;
 
-            FirstDayOfWeek = DateTime.Today.GetFirstDayOfWeek().DayOfWeek;
+            FirstDayOfWeek = CultureInfo.CurrentCulture.DateTimeFormat.FirstDayOfWeek;
 
             if (!IsMono)
             {
diff --git a/src/NzbDrone.Common/NzbDrone.Common.csproj b/src/NzbDrone.Common/NzbDrone.Common.csproj
index b6666bda7..086bd8d80 100644
--- a/src/NzbDrone.Common/NzbDrone.Common.csproj
+++ b/src/NzbDrone.Common/NzbDrone.Common.csproj
@@ -66,7 +66,6 @@
     <Compile Include="Composition\Container.cs" />
     <Compile Include="Composition\IContainer.cs" />
     <Compile Include="Composition\ContainerBuilderBase.cs" />
-    <Compile Include="DateTimeExtensions.cs" />
     <Compile Include="DictionaryExtensions.cs" />
     <Compile Include="Disk\DiskProviderBase.cs" />
     <Compile Include="EnsureThat\Ensure.cs" />