diff --git a/src/System.Private.CoreLib/shared/Interop/Unix/System.Native/Interop.GetSystemTimeAsTicks.cs b/src/System.Private.CoreLib/shared/Interop/Unix/System.Native/Interop.GetSystemTimeAsTicks.cs
index d33b3f36853..f02ecac13b9 100644
--- a/src/System.Private.CoreLib/shared/Interop/Unix/System.Native/Interop.GetSystemTimeAsTicks.cs
+++ b/src/System.Private.CoreLib/shared/Interop/Unix/System.Native/Interop.GetSystemTimeAsTicks.cs
@@ -2,8 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-using System;
-using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
 internal static partial class Interop
diff --git a/src/System.Private.CoreLib/shared/System.Private.CoreLib.Shared.projitems b/src/System.Private.CoreLib/shared/System.Private.CoreLib.Shared.projitems
index b44cc1e31f4..8063228b62d 100644
--- a/src/System.Private.CoreLib/shared/System.Private.CoreLib.Shared.projitems
+++ b/src/System.Private.CoreLib/shared/System.Private.CoreLib.Shared.projitems
@@ -1138,6 +1138,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)Interop\Unix\System.Native\Interop.Write.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Internal\IO\File.Unix.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Microsoft\Win32\SafeHandles\SafeFileHandle.Unix.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)System\DateTime.Unix.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\DebugProvider.Unix.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Environment.Unix.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Globalization\CalendarData.Unix.cs" />
diff --git a/src/System.Private.CoreLib/shared/System/DateTime.Unix.cs b/src/System.Private.CoreLib/shared/System/DateTime.Unix.cs
new file mode 100644
index 00000000000..6cf018115ba
--- /dev/null
+++ b/src/System.Private.CoreLib/shared/System/DateTime.Unix.cs
@@ -0,0 +1,27 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+namespace System
+{
+    public readonly partial struct DateTime
+    {
+        internal const bool s_systemSupportsLeapSeconds = false;
+
+#if !CORECLR
+        public static DateTime UtcNow
+        {
+            get
+            {
+                return new DateTime(((ulong)(Interop.Sys.GetSystemTimeAsTicks() + UnixEpochTicks)) | KindUtc);
+            }
+        }
+#endif
+
+        internal static DateTime FromFileTimeLeapSecondsAware(long fileTime) => default;
+        internal static long ToFileTimeLeapSecondsAware(long ticks) => default;
+
+        // IsValidTimeWithLeapSeconds is not expected to be called at all for now on non-Windows platforms
+        internal static bool IsValidTimeWithLeapSeconds(int year, int month, int day, int hour, int minute, int second, DateTimeKind kind) => false;
+    }
+}