diff --git a/src/General/Build.coffee b/src/General/Build.coffee
index fe32d02a3..9eca7e15e 100644
--- a/src/General/Build.coffee
+++ b/src/General/Build.coffee
@@ -79,6 +79,9 @@ Build =
         tag:       data.tag
         hasDownscale: !!data.m_img
       o.file.dimensions = "#{o.file.width}x#{o.file.height}" unless /\.pdf$/.test o.file.url
+    # Temporary JSON properties for events such as April 1 / Halloween
+    for key of data when key[0] is 'x'
+      o[key] = data[key]
     o
 
   parseComment: (html) ->