diff --git a/docs/en/Blog-Posts/2020-08-20 v3_1_Release/Post.md b/docs/en/Blog-Posts/2020-08-20 v3_1_Release/Post.md
index 365005bedf..b61d77e3c8 100644
--- a/docs/en/Blog-Posts/2020-08-20 v3_1_Release/Post.md	
+++ b/docs/en/Blog-Posts/2020-08-20 v3_1_Release/Post.md	
@@ -21,7 +21,7 @@ Today, we've released `3.1.0-rc.1` as the first preview version. We may release
 
 We **won't add new features** to a version after publishing the preview version. We only will make **bug fixes** until the stable version. The new features being developed in this period will be available in the next version.
 
-> We will use `-rc.x` suffix (like `3.1.0-rc.1` and `3.1.0-rc.2`) for preview releases. However, we may also publish with `-preview.x` suffix before RC (Release Candidate) releases, especially for major versions (like 4.x, 5.x...).
+> We will use `-rc.x` suffix (like `3.1.0-rc.1` and `3.1.0-rc.2`) for preview releases. However, we may also publish with `-preview.x` suffix before RC (Release Candidate) releases, especially for major versions (like 4.0, 5.0...).
 
 ### About the Nightly Builds
 
@@ -260,4 +260,4 @@ The main goals of the 3.1 version were;
 * Develop a system to lunch **preview versions** of the platform. `3.1.0-rc.1` is the first preview version that has been published with this new system.
 * Complete the fundamental **documentation & tutorials** (we've even created a [video tutorial series](https://www.youtube.com/watch?v=cJzyIFfAlp8&list=PLsNclT2aHJcPNaCf7Io3DbMN6yAk_DgWJ)).
 
-ABP.IO platform will be more mature & stable with the v3.1. Enjoy Coding!
\ No newline at end of file
+ABP.IO platform will be more mature & stable with the v3.1. Enjoy Coding!
diff --git a/framework/src/Volo.Abp.AspNetCore.Mvc/Volo/Abp/ObjectExtending/ObjectExtendingPropertyInfoExtensions.cs b/framework/src/Volo.Abp.AspNetCore.Mvc/Volo/Abp/ObjectExtending/ObjectExtendingPropertyInfoExtensions.cs
index dc8a28e89f..7daea2cad0 100644
--- a/framework/src/Volo.Abp.AspNetCore.Mvc/Volo/Abp/ObjectExtending/ObjectExtendingPropertyInfoExtensions.cs
+++ b/framework/src/Volo.Abp.AspNetCore.Mvc/Volo/Abp/ObjectExtending/ObjectExtendingPropertyInfoExtensions.cs
@@ -9,7 +9,9 @@ namespace Volo.Abp.ObjectExtending
         private static readonly Type[] DateTimeTypes =
         {
             typeof(DateTime),
-            typeof(DateTimeOffset)
+            typeof(DateTime?),
+            typeof(DateTimeOffset),
+            typeof(DateTimeOffset?)
         };
 
         public static bool IsDate(this IBasicObjectExtensionPropertyInfo property)