diff --git a/app/controllers/e_papers_controller.rb b/app/controllers/e_papers_controller.rb
index a076721..a11d8c4 100644
--- a/app/controllers/e_papers_controller.rb
+++ b/app/controllers/e_papers_controller.rb
@@ -66,6 +66,7 @@ class EPapersController < ApplicationController
 				"period" => paper.period,
 				"description" => paper.description,
 				"category" => paper.category.title,
+				"publish_date" => paper.created_at.strftime("%Y-%m-%d"),
 				"th_title" => t('e_paper.title'),
 				"th_category" => t('category'),
 				"th_period" => t('e_paper.period'),