diff --git a/frontend/src/components/CalendarQalendar.vue b/frontend/src/components/CalendarQalendar.vue
index d44294cc..af09c24b 100644
--- a/frontend/src/components/CalendarQalendar.vue
+++ b/frontend/src/components/CalendarQalendar.vue
@@ -5,8 +5,8 @@ import {
 import { Qalendar } from 'qalendar';
 import 'qalendar/dist/style.css';
 import CalendarEvent from '@/elements/CalendarEvent.vue';
-import { appointmentState } from '@/definitions';
-import { timeFormat } from '@/utils';
+import { appointmentState, colorSchemes, dateFormatStrings } from '@/definitions';
+import { getLocale, getPreferredTheme, timeFormat } from '@/utils';
 
 // component constants
 const dj = inject('dayjs');
@@ -29,17 +29,11 @@ const {
 
 const qalendarRef = ref();
 
-const dateFormatStrings = {
-  qalendar: 'YYYY-MM-DD HH:mm',
-  qalendarFullDay: 'YYYY-MM-DD',
-  // Display formats
-  display12Hour: 'hh:mma',
-  display24Hour: 'HH:mm',
-};
 const displayFormat = timeFormat();
 const calendarColors = ref({});
 const selectedDate = ref(null);
 const calendarMode = ref('month');
+const preferredTheme = getPreferredTheme();
 
 // component emits
 const emit = defineEmits(['daySelected', 'eventSelected', 'dateChange']);
@@ -259,6 +253,12 @@ const config = ref({
   },
 });
 
+// We only support two locales right now so just stick this in.
+const locale = getLocale();
+if (locale) {
+  config.value.locale = locale === 'de' ? 'de-DE' : 'en-US';
+}
+
 /**
  * Qalendar's selectedDate is only set on init and never updated. So we have to poke at their internals...
  */
@@ -275,7 +275,7 @@ watch(currentDate, () => {
 
 </script>
 <template>
-  <div class="w-full">
+  <div class="w-full" :style="{'color-scheme': preferredTheme === colorSchemes.dark ? 'dark' : null}" :class="{'is-light-mode': preferredTheme === colorSchemes.light}">
     <qalendar
       :events="calendarEvents"
       :config="config"
@@ -318,7 +318,7 @@ watch(currentDate, () => {
 /*
  * Re-theme of Qalendar for Appointment
  */
-:root {
+.calendar-root-wrapper {
   --qalendar-appointment-bg: theme('backgroundColor.white');
   --qalendar-appointment-fg: theme('backgroundColor.gray.100');
   --qalendar-appointment-border-color: theme('borderColor.gray.200');
@@ -330,13 +330,11 @@ watch(currentDate, () => {
   --qalendar-appointment-button-hover-scale: theme('scale.102');
 }
 
-@media (prefers-color-scheme: dark) {
-  :root {
-    --qalendar-appointment-bg: theme('backgroundColor.gray.700');
-    --qalendar-appointment-fg: theme('backgroundColor.gray.600');
-    --qalendar-appointment-border-color: theme('borderColor.gray.500');
-    --qalendar-appointment-text: theme('colors.gray.300');
-  }
+.dark .calendar-root-wrapper {
+  --qalendar-appointment-bg: theme('backgroundColor.gray.700');
+  --qalendar-appointment-fg: theme('backgroundColor.gray.600');
+  --qalendar-appointment-border-color: theme('borderColor.gray.500');
+  --qalendar-appointment-text: theme('colors.gray.300');
 }
 
 /* Override some of Qalendar's css variables */
diff --git a/frontend/src/components/ScheduleCreation.vue b/frontend/src/components/ScheduleCreation.vue
index 4d79ff3c..e015720f 100644
--- a/frontend/src/components/ScheduleCreation.vue
+++ b/frontend/src/components/ScheduleCreation.vue
@@ -310,7 +310,9 @@
 </template>
 
 <script setup>
-import { locationTypes, meetingLinkProviderType, scheduleCreationState } from '@/definitions';
+import {
+  dateFormatStrings, locationTypes, meetingLinkProviderType, scheduleCreationState,
+} from '@/definitions';
 import {
   ref, reactive, computed, inject, watch, onMounted,
 } from 'vue';
@@ -322,7 +324,7 @@ import SecondaryButton from '@/elements/SecondaryButton';
 import TabBar from '@/components/TabBar';
 
 // icons
-import { IconChevronDown, IconExternalLink } from '@tabler/icons-vue';
+import { IconChevronDown } from '@tabler/icons-vue';
 import AlertBox from '@/elements/AlertBox';
 import SwitchToggle from '@/elements/SwitchToggle';
 
@@ -332,8 +334,7 @@ const { t } = useI18n();
 const dj = inject('dayjs');
 const call = inject('call');
 const isoWeekdays = inject('isoWeekdays');
-const dateFormat = 'YYYY-MM-DD';
-
+const dateFormat = dateFormatStrings.qalendarFullDay;
 
 // component emits
 const emit = defineEmits(['created', 'updated']);
diff --git a/frontend/src/components/bookingView/BookingViewSlotSelection.vue b/frontend/src/components/bookingView/BookingViewSlotSelection.vue
index 8d863ea5..6b27fdd0 100644
--- a/frontend/src/components/bookingView/BookingViewSlotSelection.vue
+++ b/frontend/src/components/bookingView/BookingViewSlotSelection.vue
@@ -36,26 +36,17 @@
 import { storeToRefs } from 'pinia';
 import { useI18n } from 'vue-i18n';
 
-import { bookingCalendarViews as views } from '@/definitions';
 import { useBookingViewStore } from '@/stores/booking-view-store';
+import { dateFormatStrings } from '@/definitions';
 
-import CalendarDay from '@/components/CalendarDay';
-import CalendarMonth from '@/components/CalendarMonth';
-import CalendarPageHeading from '@/elements/CalendarPageHeading';
-import CalendarWeek from '@/components/CalendarWeek';
 import PrimaryButton from '@/elements/PrimaryButton';
-import { computed, inject } from 'vue';
 import CalendarQalendar from '@/components/CalendarQalendar.vue';
 
 const { t } = useI18n();
-const dj = inject('dayjs');
 const {
-  appointment, activeView, activeDate, selectedEvent,
+  appointment, activeDate, selectedEvent,
 } = storeToRefs(useBookingViewStore());
 
-const startOfActiveWeek = computed(() => activeDate.value.startOf('week'));
-const endOfActiveWeek = computed(() => activeDate.value.endOf('week'));
-
 const emit = defineEmits(['openModal']);
 defineProps({
   showNavigation: Boolean,
@@ -63,64 +54,6 @@ defineProps({
 
 // Computed
 
-/**
- * Appointment data formatted for the month calendar view.
- * @type {ComputedRef<[{slots: [], title: string}]>}
- */
-const dayPlaceholder = computed(() => {
-  const apmt = { title: t('label.checkAvailableSlots'), slots: [] };
-  const existingDates = [];
-  appointment.value?.slots.forEach((slot) => {
-    const key = dj(slot.start).format('YYYY-MM-DD');
-    if (!existingDates.includes(key)) {
-      existingDates.push(key);
-      apmt.slots.push(slot);
-    }
-  });
-  return [apmt];
-});
-
-/**
- * Returns the formatted date depending on the current calendar view
- * @type {ComputedRef<string>}
- */
-const viewTitle = computed(() => {
-  switch (activeView.value) {
-    case views.day:
-      return activeDate.value.format('dddd Do');
-    case views.week:
-    case views.weekAfterMonth:
-      return `${startOfActiveWeek.value.format('ddd Do')} - ${endOfActiveWeek.value.format('ddd Do')}`;
-    default:
-      return '';
-  }
-});
-
-// Functions
-
-/**
- * Adjusts the date by 1 unit (e.g. month, day, week.) Direction is determined by forward.
- * @param unit string
- * @param forward bool
- */
-const dateNav = (unit = 'month', forward = true) => {
-  if (forward) {
-    activeDate.value = activeDate.value.add(1, unit);
-  } else {
-    activeDate.value = activeDate.value.subtract(1, unit);
-  }
-};
-
-/**
- * Display a specific week within our calendar view.
- * This is triggered when you click into an event on the monthly calendar view.
- * @param day string
- */
-const showWeek = (day) => {
-  activeDate.value = dj(day);
-  activeView.value = views.weekAfterMonth;
-};
-
 /**
  * Select a specific time slot
  * @param day string
@@ -129,7 +62,7 @@ const selectEvent = (day) => {
   // set event selected
   for (let i = 0; i < appointment.value.slots.length; i += 1) {
     const slot = appointment.value.slots[i];
-    if (slot.start.format('YYYY-MM-DD HH:mm') === day) {
+    if (slot.start.format(dateFormatStrings.qalendar) === day) {
       slot.selected = true;
       const e = { ...appointment.value, ...slot };
       delete e.slots;
diff --git a/frontend/src/definitions.js b/frontend/src/definitions.js
index a06d466f..b6f2d028 100644
--- a/frontend/src/definitions.js
+++ b/frontend/src/definitions.js
@@ -1,3 +1,17 @@
+/**
+ * Available date format strings
+ * @readonly
+ * @enum
+ */
+export const dateFormatStrings = {
+  // Qalendar specific formats (These have to be in this format for qalendar to understand them)
+  qalendar: 'YYYY-MM-DD HH:mm',
+  qalendarFullDay: 'YYYY-MM-DD',
+  // Time display formats
+  display12Hour: 'hh:mma',
+  display24Hour: 'HH:mm',
+};
+
 // appointment location types
 export const subscriberLevels = {
   basic: 1,
@@ -94,7 +108,11 @@ export const settingsSections = {
   // faq:                    6,
 };
 
-// available color schemes for theme
+/**
+ * available color schemes for theme
+ * @readonly
+ * @enum
+ */
 export const colorSchemes = {
   system: 1,
   dark: 2,
@@ -141,4 +159,5 @@ export default {
   settingsSections,
   viewTypes,
   meetingLinkProviderType,
+  dateFormatStrings,
 };
diff --git a/frontend/src/utils.js b/frontend/src/utils.js
index 122ee80c..715d22cb 100644
--- a/frontend/src/utils.js
+++ b/frontend/src/utils.js
@@ -1,4 +1,6 @@
 // get the first key of given object that points to given value
+import { colorSchemes } from '@/definitions.js';
+
 export const keyByValue = (o, v) => Object.keys(o).find((k) => o[k] === v);
 
 // create event color for border and background, inherited from calendar color attribute
@@ -90,12 +92,46 @@ export const showEventPopup = (el, event, position = 'right') => {
   return obj;
 };
 
+/**
+ * Returns the stored locale setting or null if none is set.
+ * TODO: This should be moved to a settings store
+ * @returns {string|null}
+ */
+export const getLocale = () => {
+  const locale = localStorage?.getItem('locale');
+  if (!locale) {
+    return null;
+  }
+  return locale;
+};
+
+/**
+ * Returns the stored theme value. If the stored value does not exist, it will guess based on prefers-color-scheme.
+ * TODO: This should be moved to a settings store
+ * @returns {colorSchemes} - Colour theme value
+ */
+export const getPreferredTheme = () => {
+  const theme = localStorage?.getItem('theme');
+  if (!theme) {
+    return window.matchMedia('(prefers-color-scheme: dark)').matches ? colorSchemes.dark : colorSchemes.light;
+  }
+
+  switch (theme) {
+    case 'dark':
+      return colorSchemes.dark;
+    case 'light':
+      return colorSchemes.light;
+    default:
+      // This would be colorSchemes.system, but I feel like we need a definitive answer here.
+      return window.matchMedia('(prefers-color-scheme: dark)').matches ? colorSchemes.dark : colorSchemes.light;
+  }
+};
+
 /**
  * via: https://stackoverflow.com/a/11868398
  */
 export const getAccessibleColor = (hexcolor) => {
-  // TODO: Move this to utility and pull it into Vue.
-  const defaultColor = localStorage?.getItem('theme') === 'dark' ?? !window.matchMedia('(prefers-color-scheme: dark)').matches ? 'white' : 'black';
+  const defaultColor = getPreferredTheme() === colorSchemes.dark ? 'white' : 'black';
   if (!hexcolor) {
     return defaultColor;
   }
@@ -115,4 +151,5 @@ export default {
   initialEventPopupData,
   showEventPopup,
   getAccessibleColor,
+  getLocale,
 };
diff --git a/frontend/src/views/CalendarView.vue b/frontend/src/views/CalendarView.vue
index 3f574a8f..cb971c0e 100644
--- a/frontend/src/views/CalendarView.vue
+++ b/frontend/src/views/CalendarView.vue
@@ -133,32 +133,8 @@ const activeDateRange = computed(() => ({
   end: activeDate.value.endOf('month'),
 }));
 
-// date calculations
-const startOfActiveWeek = computed(() => activeDate.value.startOf('week'));
-const endOfActiveWeek = computed(() => activeDate.value.endOf('week'));
-
 // active menu item for tab navigation of calendar views
 const tabActive = ref(calendarViews[route.params.view]);
-const updateTab = (view) => {
-  router.replace({
-    name: route.name,
-    params: { view, date: route.params.date ?? dj().format('YYYY-MM-DD') },
-  });
-  tabActive.value = calendarViews[view];
-};
-
-// calculate page title
-const pageTitle = computed(() => {
-  switch (tabActive.value) {
-    case calendarViews.day:
-      return activeDate.value.format('dddd Do');
-    case calendarViews.week:
-      return `${startOfActiveWeek.value.format('ddd Do')} - ${endOfActiveWeek.value.format('ddd Do')}`;
-    case calendarViews.month:
-    default:
-      return '';
-  }
-});
 
 // appointment creation state
 const creationStatus = ref(appointmentCreationState.hidden);