[ci skip] Prepare 3.1.5 release
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 4695edc..21a1c0c 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -5,7 +5,7 @@
 Version 3.1.5
 =============
 
-Release Date: Not Released
+Release Date: Jun 19, 2017
 
 -  **Security**
 
@@ -28,7 +28,7 @@
 Version 3.1.4
 =============
 
-Release Date: March 20, 2017
+Release Date: Mar 20, 2017
 
 -  **Security**