diff --git a/app/controllers/report_controller.rb b/app/controllers/report_controller.rb
--- a/app/controllers/report_controller.rb
+++ b/app/controllers/report_controller.rb
@@ -2,6 +2,11 @@
   def login_stat
     @logins = Array.new
     login = Login.all
+
+    date_and_time = '%y-%m-%d %H:%M'
+    since_time = strptime(params[:since_datetime],date_and_time)
+    until_time = strptime(params[:until_datetime],date_and_time)
+    
     User.all.each do |user|
       @logins << { login: user.login, 
                    full_name: user.full_name,