diff --git a/lib/tasks/homework_publishtime.rake b/lib/tasks/homework_publishtime.rake
index 2f999384c..440c04a09 100644
--- a/lib/tasks/homework_publishtime.rake
+++ b/lib/tasks/homework_publishtime.rake
@@ -18,7 +18,7 @@ namespace :homework_publishtime do
               if str != ""
                 str += ","
               end
-              str += "('#{name_str}',#{homework.id},#{student.student_id}, '#{format_time(Time.now)}', '#{format_time(Time.now)}')"
+              str += "('#{name_str}',#{homework.id},#{student.student_id}, '#{Time.now}', '#{Time.now}')"
             end
             sql = "insert into student_works (name, homework_common_id,user_id, created_at, updated_at) values" + str
             ActiveRecord::Base.connection.execute sql