diff --git a/Gemfile b/Gemfile
index 87338c24f..ee7827cee 100644
--- a/Gemfile
+++ b/Gemfile
@@ -105,3 +105,6 @@ gem 'prawn'
 gem 'prawn-table'
 
 gem 'puma'
+
+# ical export
+gem 'icalendar'
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 97b5066b7..bf9d7b363 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -4,14 +4,15 @@ class ApplicationController < ActionController::Base
   #  http_basic_authenticate_with :name => "test", :password => "ttt"
 
   helper_method :current_user,
-  :authentication_check,
-  :config_frontend,
-  :is_role,
-  :model_create_render,
-  :model_update_render,
-  :model_restory_render,
-  :mode_show_rendeder,
-  :model_index_render
+                :authentication_check,
+                :authentication_check_action_token,
+                :config_frontend,
+                :is_role,
+                :model_create_render,
+                :model_update_render,
+                :model_restory_render,
+                :mode_show_rendeder,
+                :model_index_render
 
   skip_before_filter :verify_authenticity_token
   before_filter :set_user, :session_update
@@ -193,6 +194,24 @@ class ApplicationController < ActionController::Base
     true
   end
 
+  def authentication_check_action_token(action)
+
+    user = Token.check(
+      :action => action,
+      :name   => params[:action_token],
+    )
+
+    if !user
+      puts params.inspect
+      response_access_deny
+      return
+    end
+
+    current_user_set( user )
+
+    true
+  end
+
   def is_role( role_name )
     return false if !current_user
     return true if current_user.is_role( role_name )
diff --git a/app/controllers/ical_tickets_controller.rb b/app/controllers/ical_tickets_controller.rb
new file mode 100644
index 000000000..bca5f24f5
--- /dev/null
+++ b/app/controllers/ical_tickets_controller.rb
@@ -0,0 +1,195 @@
+# Copyright (C) 2012-2015 Zammad Foundation, http://zammad-foundation.org/
+
+require 'icalendar'
+
+class IcalTicketsController < ApplicationController
+  before_filter  { authentication_check_action_token 'iCal' }
+
+  # @path       [GET] /ical/tickets_all/:action_token
+  #
+  # @summary          Returns an iCal file with all tickets (open, new, pending, esclation) as events.
+  #
+  # @parameter        action_token(required) [String] The action_token identifying the requested User privileged for 'iCal' action.
+  #
+  # @response_message 200 [String] iCal file ready to import in calendar applications.
+  # @response_message 401          Permission denied.
+  def all
+
+    new_open_events_data   = new_open_events_data_get
+    pending_events_data    = pending_events_data_get
+    escalation_events_data = escalation_events_data_get
+
+    events_data = new_open_events_data + pending_events_data + escalation_events_data
+
+    events_data_to_ical( events_data )
+  end
+
+  # @path       [GET] /ical/tickets_new_open/:action_token
+  #
+  # @summary          Returns an iCal file with all new and open tickets as events.
+  #
+  # @parameter        action_token(required) [String] The action_token identifying the requested User privileged for 'iCal' action.
+  #
+  # @response_message 200 [String] iCal file ready to import in calendar applications.
+  # @response_message 401          Permission denied.
+  def new_open
+
+    events_data = new_open_events_data_get
+
+    events_data_to_ical( events_data )
+  end
+
+  # @path       [GET] /ical/tickets_pending/:action_token
+  #
+  # @summary          Returns an iCal file with all pending tickets as events.
+  #
+  # @parameter        action_token(required) [String] The action_token identifying the requested User privileged for 'iCal' action.
+  #
+  # @response_message 200 [String] iCal file ready to import in calendar applications.
+  # @response_message 401          Permission denied.
+  def pending
+    events_data = pending_events_data_get
+
+    events_data_to_ical( events_data )
+  end
+
+  # @path       [GET] /ical/ticket_escalation/:action_token
+  #
+  # @summary          Returns an iCal file with all escalation times for tickets as events.
+  #
+  # @parameter        action_token(required) [String] The action_token identifying the requested User privileged for 'iCal' action.
+  #
+  # @response_message 200 [String] iCal file ready to import in calendar applications.
+  # @response_message 401          Permission denied.
+  def escalation
+    events_data = escalation_events_data_get
+
+    events_data_to_ical( events_data )
+  end
+
+  private
+
+  def new_open_events_data_get
+
+    condition = {
+      'tickets.owner_id' => current_user.id,
+      'tickets.state_id' => Ticket::State.where(
+        :state_type_id => Ticket::StateType.where(
+          :name => [
+            'new',
+            'open',
+          ],
+        ),
+      ),
+    }
+
+    tickets = Ticket.search(
+      :current_user => current_user,
+      :condition    => condition,
+    )
+
+    events_data = []
+    tickets.each do |ticket|
+
+      event_data = {}
+
+      event_data[:dtstart]     = Icalendar::Values::Date.new( Date.today )
+      event_data[:dtend]       = Icalendar::Values::Date.new( Date.today )
+      event_data[:summary]     = "#{ ticket.state.name } ticket: '#{ ticket.title }'"
+      event_data[:description] = "T##{ ticket.number }"
+
+      events_data.push event_data
+    end
+
+    events_data
+  end
+
+  def pending_events_data_get
+
+    condition = {
+      'tickets.owner_id' => current_user.id,
+      'tickets.state_id' => Ticket::State.where(
+        :state_type_id => Ticket::StateType.where(
+          :name => [
+            'pending reminder',
+            'pending action',
+          ],
+        ),
+      ),
+    }
+
+    tickets = Ticket.search(
+      :current_user => current_user,
+      :condition    => condition,
+    )
+
+    events_data = []
+    tickets.each do |ticket|
+
+      event_data = {}
+
+      event_data[:dtstart]     = Icalendar::Values::DateTime.new( ticket.pending_time )
+      event_data[:dtend]       = Icalendar::Values::DateTime.new( ticket.pending_time )
+      event_data[:summary]     = "#{ ticket.state.name } ticket: '#{ ticket.title }'"
+      event_data[:description] = "T##{ ticket.number }"
+
+      events_data.push event_data
+    end
+
+    events_data
+  end
+
+
+  def escalation_events_data_get
+
+    condition = [
+      'tickets.escalation_time IS NOT NULL',
+      'tickets.owner_id = ?', current_user.id
+    ]
+
+    tickets = Ticket.search(
+      :current_user => current_user,
+      :condition    => condition,
+    )
+
+    events_data = []
+    tickets.each do |ticket|
+
+      event_data = {}
+
+      event_data[:dtstart]     = Icalendar::Values::DateTime.new( ticket.escalation_time )
+      event_data[:dtend]       = Icalendar::Values::DateTime.new( ticket.escalation_time )
+      event_data[:summary]     = "ticket escalation: '#{ ticket.title }'"
+      event_data[:description] = "T##{ ticket.number }"
+
+      events_data.push event_data
+    end
+
+    events_data
+  end
+
+  def events_data_to_ical(events_data)
+
+    cal = Icalendar::Calendar.new
+
+    events_data.each do |event_data|
+
+      cal.event do |e|
+        e.dtstart     = event_data[:dtstart]
+        e.dtend       = event_data[:dtend]
+        e.summary     = event_data[:summary]
+        e.description = event_data[:description]
+        e.ip_class    = "PRIVATE"
+      end
+
+    end
+
+    send_data(
+      cal.to_ical,
+      :filename    => 'zammad.ical',
+      :type        => 'text/plain',
+      :disposition => 'inline'
+    )
+  end
+
+end
diff --git a/app/models/token.rb b/app/models/token.rb
index 698b96a4a..a5c1c338a 100644
--- a/app/models/token.rb
+++ b/app/models/token.rb
@@ -12,7 +12,8 @@ class Token < ActiveRecord::Base
     return if !token
 
     # check if token is still valid
-    if token.created_at < 1.day.ago
+    if !token.persistent &&
+        token.created_at < 1.day.ago
 
       # delete token
       token.delete
diff --git a/config/routes/ical_tickets.rb b/config/routes/ical_tickets.rb
new file mode 100644
index 000000000..b5cd0a9f0
--- /dev/null
+++ b/config/routes/ical_tickets.rb
@@ -0,0 +1,9 @@
+Zammad::Application.routes.draw do
+  api_path = Rails.configuration.api_path
+
+  # ical ticket
+  match api_path + '/ical/tickets/:action_token',              :to => 'ical_tickets#all',           :via => :get
+  match api_path + '/ical/tickets_new_open/:action_token',     :to => 'ical_tickets#new_open',      :via => :get
+  match api_path + '/ical/tickets_pending/:action_token',      :to => 'ical_tickets#pending',       :via => :get
+  match api_path + '/ical/tickets_escalation/:action_token',   :to => 'ical_tickets#escalation',    :via => :get
+end
\ No newline at end of file
diff --git a/db/migrate/20150220216145_token_persistent.rb b/db/migrate/20150220216145_token_persistent.rb
new file mode 100644
index 000000000..6f3277096
--- /dev/null
+++ b/db/migrate/20150220216145_token_persistent.rb
@@ -0,0 +1,8 @@
+class TokenPersistent < ActiveRecord::Migration
+  def up
+    add_column :tokens, :persistent, :boolean
+  end
+
+  def down
+  end
+end
diff --git a/test/unit/token_test.rb b/test/unit/token_test.rb
new file mode 100644
index 000000000..bd7108dfb
--- /dev/null
+++ b/test/unit/token_test.rb
@@ -0,0 +1,109 @@
+# encoding: utf-8
+require 'test_helper'
+
+class TokenTest < ActiveSupport::TestCase
+  test 'token' do
+
+    tests = [
+
+      # test 1
+      {
+        :test_name => 'invalid token',
+        :action    => 'PasswordReset',
+        :name      => '1NV4L1D',
+        :result    => nil,
+      },
+
+      # test 2
+      {
+        :test_name => 'fresh token',
+        :create    => {
+          :user_id => 2,
+          :action  => 'PasswordReset',
+        },
+        :action => 'PasswordReset',
+        :result => true,
+        :verify => {
+          :firstname => 'Nicole',
+          :lastname  => 'Braun',
+          :email     => 'nicole.braun@zammad.org',
+        }
+      },
+
+      # test 3
+      {
+        :test_name => 'two days but not persistent',
+        :create    => {
+          :user_id    => 2,
+          :action     => 'PasswordReset',
+          :created_at => 2.day.ago,
+        },
+        :action => 'PasswordReset',
+        :result => nil,
+      },
+
+      {
+        :test_name => 'two days but persistent',
+        :create    => {
+          :user_id    => 2,
+          :action     => 'iCal',
+          :created_at => 2.day.ago,
+          :persistent => true,
+        },
+        :action => 'iCal',
+        :result => true,
+        :verify => {
+          :firstname => 'Nicole',
+          :lastname  => 'Braun',
+          :email     => 'nicole.braun@zammad.org',
+        }
+      },
+    ]
+
+    tests.each { |test|
+
+      if test[:create]
+
+        #puts test[:test_name] + ': creating token '+ test[:create].inspect
+
+        token = Token.create(
+          :action     => test[:create][:action],
+          :user_id    => test[:create][:user_id],
+          :created_at => test[:create][:created_at].to_s,
+          :persistent => test[:create][:persistent]
+        )
+
+        #puts test[:test_name] + ': created token ' + token.inspect
+
+        test[:name] = token.name
+      end
+
+      user = Token.check(
+        :action => test[:action],
+        :name   => test[:name]
+      )
+
+      if test[:result] == true
+        if !user
+          assert( false, test[:test_name] + ': token verification failed' )
+        else
+          test[:verify].each {|key, value|
+            assert_equal( user[key], value, 'verify' )
+          }
+        end
+      else
+        assert_equal( test[:result], user, test[:test_name] + ': failed or not existing' )
+      end
+
+      if test[:name]
+        #puts test[:test_name] + ': deleting token '+ test[:name]
+
+        token = Token.where( :name => test[:name] ).first
+
+        if token
+          token.destroy
+        end
+      end
+    }
+  end
+end
\ No newline at end of file