diff --git a/lib/service/geo_calendar.rb b/lib/service/geo_calendar.rb
new file mode 100644
index 000000000..5fe8744f1
--- /dev/null
+++ b/lib/service/geo_calendar.rb
@@ -0,0 +1,67 @@
+# Copyright (C) 2012-2013 Zammad Foundation, http://zammad-foundation.org/
+
+module Service
+  class GeoCalendar
+    include ApplicationLib
+
+=begin
+
+lookup calendar based on ip or hostname
+
+  result = Service::GeoCalendar.location( '99.99.99.99' )
+
+lookup calendar based on own system ip
+
+  result = Service::GeoCalendar.location
+
+returns
+
+  result = {
+    "name" => 'Country Name',
+    "timezone" => 'time zone of ip',
+    "business_hours" => {
+      "mon" => {
+        "active" => true,
+        "timeframes" => [["09:00","17:00"]]
+      },
+      "tue" => {
+        "active" => true,
+        "timeframes" => [["09:00","17:00"]]
+      },
+      "wed":{
+        "active" => true,
+        "timeframes" => [["09:00","17:00"]]
+      },
+      "thu":{
+        "active" => true,
+        "timeframes" => [["09:00","17:00"]]
+      },
+      "fri":{
+        "active" => true,
+        "timeframes" => [["09:00","17:00"]]
+      },
+      "sat":{
+        "active" => false,
+        "timeframes" => [["09:00","17:00"]]
+      },
+      "sun":{
+        "active" => false,
+        "timeframes" => [["09:00","17:00"]]
+      }
+    },
+    "ical_url" => "",
+  }
+
+=end
+
+    def self.location(address = nil)
+
+      # load backend
+      backend = load_adapter_by_setting( 'geo_calendar_backend' )
+      return if !backend
+
+      # db lookup
+      backend.location(address)
+    end
+  end
+end
diff --git a/lib/service/geo_calendar/zammad.rb b/lib/service/geo_calendar/zammad.rb
new file mode 100644
index 000000000..d4ce1d4ef
--- /dev/null
+++ b/lib/service/geo_calendar/zammad.rb
@@ -0,0 +1,44 @@
+# Copyright (C) 2012-2013 Zammad Foundation, http://zammad-foundation.org/
+
+require 'cache'
+
+class Service::GeoCalendar::Zammad
+  def self.location(address)
+
+    # check cache
+    cache_key = "zammadgeocalendar::#{address}"
+    cache = Cache.get( cache_key )
+    return cache if cache
+
+    # do lookup
+    host = 'https://geo.zammad.com'
+    if address
+      url  = "/calendar?ip=#{CGI.escape address}"
+    else
+      url  = '/calendar'
+    end
+    data = {}
+    begin
+      response = UserAgent.get(
+        "#{host}#{url}",
+        {},
+        {
+          json: true,
+          open_timeout: 2,
+          read_timeout: 4,
+        },
+      )
+      if !response.success? && response.code.to_s !~ /^40.$/
+        fail "ERROR: #{response.code}/#{response.body}"
+      end
+
+      data = response.data
+
+      Cache.write( cache_key, data, { expires_in: 1.day } )
+    rescue => e
+      Rails.logger.error "#{host}#{url}: #{e.inspect}"
+      Cache.write( cache_key, data, { expires_in: 1.minutes } )
+    end
+    data
+  end
+end