diff --git a/components/contact.js b/components/contact.js
index 823d8e6..2619a4d 100644
--- a/components/contact.js
+++ b/components/contact.js
@@ -17,18 +17,6 @@ export default function Contact({}) {
         <label htmlFor="destination">Fahrtziel</label>
         <input id="destination" name="destination" type="text" />
       </div>
-      <div>
-        <label htmlFor="driver1">Fahrer 1</label>
-        <input id="driver1" name="driver1" type="text" />
-        <label htmlFor="driver">Alter</label>
-        <input id="ageDriver1" name="ageDriver1" type="number" min="20" />
-      </div>
-      <div>
-        <label htmlFor="driver">Fahrer 2</label>
-        <input id="driver2" name="driver2" type="text" />
-        <label htmlFor="driver">Alter</label>
-        <input id="ageDriver2" name="ageDriver2" type="number" min="20" />
-      </div>
     </>
   )
 }
diff --git a/components/dateSelect.js b/components/dateSelect.js
index 1aa6caf..94229f8 100644
--- a/components/dateSelect.js
+++ b/components/dateSelect.js
@@ -1,80 +1,102 @@
+import { useContext } from 'react'
+import { AppContext, ACTIONS } from '../context/appStore'
+
+import TimeSelect from './timeSelect'
+
 import moment from 'moment'
 
 import 'react-dates/initialize'
 import { DateRangePicker, SingleDatePicker } from 'react-dates'
 
-import TimeSelect from './timeSelect'
+export default function DateSelect() {
+  const { state, dispatch } = useContext(AppContext)
 
-export default function DateSelect({
-  multipleDays,
-  startDate,
-  setStartDate,
-  endDate,
-  setEndDate,
-  focusedInput,
-  setFocusedInput,
-  pickupTime,
-  setPickupTime,
-  dropoffTime,
-  setDropoffTime,
-}) {
-  const timeSelect = (
+  const {
+    multipleDays,
+    startDate,
+    endDate,
+    focusedInput,
+    pickupTime,
+    dropoffTime,
+    bookedOn,
+  } = state
+
+  function isDayBlocked(momentDay) {
+    return bookedOn.some((rawDay) => momentDay.isSame(rawDay))
+  }
+
+  if (multipleDays === null || multipleDays === undefined) {
+    return null
+  }
+
+  return (
     <>
+      <div>
+        {state.multipleDays === false && (
+          <SingleDatePicker
+            date={startDate && moment(startDate)}
+            onDateChange={(date) =>
+              dispatch({
+                type: ACTIONS.SET_DATE,
+                payload: { startDate: date.toISOString() },
+              })
+            }
+            focused={typeof focusedInput === 'boolean' && focusedInput}
+            onFocusChange={({ focused }) =>
+              dispatch({
+                type: ACTIONS.SET_FOCUSED_INPUT,
+                payload: focused,
+              })
+            }
+            isDayBlocked={isDayBlocked}
+            id="your_unique_id"
+          />
+        )}
+        {state.multipleDays === true && (
+          <DateRangePicker
+            startDate={startDate && moment(startDate)}
+            startDateId="bussle_start_date_id"
+            endDate={endDate && moment(endDate)}
+            endDateId="bussle_end_date_id"
+            onDatesChange={({ startDate, endDate }) => {
+              dispatch({
+                type: ACTIONS.SET_DATE,
+                payload: {
+                  startDate: startDate && startDate.toISOString(),
+                  endDate: endDate && endDate.toISOString(),
+                },
+              })
+            }}
+            focusedInput={focusedInput}
+            onFocusChange={(focusedInput) =>
+              dispatch({
+                type: ACTIONS.SET_FOCUSED_INPUT,
+                payload: focusedInput,
+              })
+            }
+            isDayBlocked={isDayBlocked}
+            minDate={moment()}
+          />
+        )}
+      </div>
       <TimeSelect
         id="pickup"
         name="pickupTime"
         label="Abholung Uhrzeit"
         value={pickupTime}
-        setValue={setPickupTime}
+        setValue={(payload) =>
+          dispatch({ type: ACTIONS.SET_PICKUP_TIME, payload })
+        }
       />
       <TimeSelect
         id="dropoff"
         name="dropoffTime"
         label="Rückgabe Uhrzeit"
         value={dropoffTime}
-        setValue={setDropoffTime}
+        setValue={(payload) =>
+          dispatch({ type: ACTIONS.SET_DROPOFF_TIME, payload })
+        }
       />
     </>
   )
-  if (multipleDays === false) {
-    return (
-      <>
-        <div>
-          <SingleDatePicker
-            date={startDate}
-            onDateChange={(date) => setStartDate(date)}
-            focused={typeof focusedInput === 'boolean' && focusedInput}
-            onFocusChange={({ focused }) => setFocusedInput(focused)}
-            id="your_unique_id"
-          />
-        </div>
-        {timeSelect}
-      </>
-    )
-  }
-
-  if (multipleDays === true) {
-    return (
-      <>
-        <div>
-          <DateRangePicker
-            startDate={startDate}
-            startDateId="bussle_start_date_id"
-            endDate={endDate}
-            endDateId="bussle_end_date_id"
-            onDatesChange={({ startDate, endDate }) => {
-              setStartDate(startDate)
-              setEndDate(endDate)
-            }}
-            focusedInput={focusedInput}
-            onFocusChange={(focusedInput) => setFocusedInput(focusedInput)}
-            minDate={moment()}
-          />
-        </div>
-        {timeSelect}
-      </>
-    )
-  }
-
-  return null
 }
diff --git a/components/driver.js b/components/driver.js
new file mode 100644
index 0000000..ddb9069
--- /dev/null
+++ b/components/driver.js
@@ -0,0 +1,18 @@
+export default function Driver({}) {
+  return (
+    <>
+      <div>
+        <label htmlFor="driver1">Fahrer 1</label>
+        <input id="driver1" name="driver1" type="text" />
+        <label htmlFor="driver">Alter</label>
+        <input id="ageDriver1" name="ageDriver1" type="number" min="20" />
+      </div>
+      <div>
+        <label htmlFor="driver">Fahrer 2</label>
+        <input id="driver2" name="driver2" type="text" />
+        <label htmlFor="driver">Alter</label>
+        <input id="ageDriver2" name="ageDriver2" type="number" min="20" />
+      </div>
+    </>
+  )
+}
diff --git a/components/rangeSelect.js b/components/rangeSelect.js
index 83af2cc..8ece828 100644
--- a/components/rangeSelect.js
+++ b/components/rangeSelect.js
@@ -1,23 +1,31 @@
-export default function RangeSelect({ multipleDays, setMultipleDays }) {
-    return (
-        <div>
-            Ich will das Bussle für
-            <input
-                type="radio"
-                id="single"
-                name="days"
-                value="singleDay"
-                onChange={() => setMultipleDays(false)}
-            />
-            <label htmlFor="single">einen Tag</label>
-            <input
-                type="radio"
-                id="multiple"
-                name="days"
-                value="multipleDays"
-                onChange={() => setMultipleDays(true)}
-            />
-            <label htmlFor="multiple">mehrere Tage</label> mieten
-        </div>
-    )
+import { useContext } from 'react'
+import { AppContext, ACTIONS } from '../context/appStore'
+export default function RangeSelect() {
+  const { state, dispatch } = useContext(AppContext)
+
+  return (
+    <div>
+      Ich will das Bussle für
+      <input
+        type="radio"
+        id="single"
+        name="days"
+        checked={state.multipleDays === false}
+        onChange={() =>
+          dispatch({ type: ACTIONS.SET_MULTIPLE_DAYS, payload: false })
+        }
+      />
+      <label htmlFor="single">einen Tag</label>
+      <input
+        type="radio"
+        id="multiple"
+        name="days"
+        checked={state.multipleDays === true}
+        onChange={() =>
+          dispatch({ type: ACTIONS.SET_MULTIPLE_DAYS, payload: true })
+        }
+      />
+      <label htmlFor="multiple">mehrere Tage</label> mieten
+    </div>
+  )
 }
diff --git a/context/appStore.js b/context/appStore.js
new file mode 100644
index 0000000..357548a
--- /dev/null
+++ b/context/appStore.js
@@ -0,0 +1,66 @@
+import React, { useReducer } from 'react'
+
+export const AppContext = React.createContext()
+
+export const ACTIONS = {
+  SET_MULTIPLE_DAYS: 'setMultipleDays',
+  SET_DATE: 'setDate',
+  SET_FOCUSED_INPUT: 'setFocusedInput',
+  SET_PICKUP_TIME: 'setPickupTime',
+  SET_DROPOFF_TIME: 'setDropoffTime',
+}
+
+function reducer(state, action) {
+  switch (action.type) {
+    case ACTIONS.SET_MULTIPLE_DAYS:
+      return {
+        ...state,
+        multipleDays: action.payload,
+        focusedInput: undefined,
+        startDate: undefined,
+        endDate: undefined,
+      }
+    case ACTIONS.SET_DATE:
+      return {
+        ...state,
+        startDate: action.payload.startDate,
+        endDate: action.payload.endDate,
+      }
+    case ACTIONS.SET_FOCUSED_INPUT:
+      return { ...state, focusedInput: action.payload }
+    case ACTIONS.SET_PICKUP_TIME:
+      return { ...state, pickupTime: action.payload }
+    case ACTIONS.SET_DROPOFF_TIME:
+      return { ...state, dropoffTime: action.payload }
+    default:
+      throw new Error(`Unkown Action type ${action.type}`)
+  }
+}
+
+function debugReducer(state, action) {
+  console.debug('applying action', action)
+  const newState = reducer(state, action)
+  console.debug(newState)
+  return newState
+}
+
+const initialState = {
+  multipleDays: null,
+  bookedOn: [
+    '2020-07-10',
+    '2020-07-11',
+    '2020-07-12',
+    '2020-07-23',
+    '2020-08-01',
+  ],
+}
+
+export default function AppStore({ children }) {
+  const [state, dispatch] = useReducer(debugReducer, initialState)
+
+  return (
+    <AppContext.Provider value={{ state, dispatch }}>
+      {children}
+    </AppContext.Provider>
+  )
+}
diff --git a/pages/index.js b/pages/index.js
index 59017fc..0cb7cb3 100644
--- a/pages/index.js
+++ b/pages/index.js
@@ -1,20 +1,15 @@
-import { useState } from 'react'
+import { useContext } from 'react'
+
 import Head from 'next/head'
 
+import AppStore from '../context/appStore'
+
 import RangeSelect from '../components/rangeSelect'
 import DateSelect from '../components/dateSelect'
 import Contact from '../components/contact'
+import Driver from '../components/driver'
 
 export default function Home() {
-  const [multipleDays, setMultipleDays] = useState(null)
-
-  const [startDate, setStartDate] = useState(null)
-  const [endDate, setEndDate] = useState(null)
-  const [focusedInput, setFocusedInput] = useState(null)
-
-  const [pickupTime, setPickupTime] = useState('')
-  const [dropoffTime, setDropoffTime] = useState('')
-
   return (
     <div className="container">
       <Head>
@@ -29,29 +24,15 @@ export default function Home() {
           Du willst das Pfadi Bussle buchen? Hier bist du richtig!
         </p>
 
-        <form className="bookingForm">
-          <RangeSelect
-            multipleDay={multipleDays}
-            setMultipleDays={setMultipleDays}
-          />
-          <DateSelect
-            multipleDays={multipleDays}
-            startDate={startDate}
-            setStartDate={setStartDate}
-            endDate={endDate}
-            setEndDate={setEndDate}
-            focusedInput={focusedInput}
-            setFocusedInput={setFocusedInput}
-            pickupTime={pickupTime}
-            setPickupTime={setPickupTime}
-            dropoffTime={dropoffTime}
-            setDropoffTime={setDropoffTime}
-          />
+        <AppStore>
+          <form className="bookingForm">
+            <RangeSelect />
+            <DateSelect />
+            <Contact />
 
-          <Contact />
-
-          <input type="submit" />
-        </form>
+            <input type="submit" />
+          </form>
+        </AppStore>
       </main>
 
       <footer>