diff --git a/css/app-settings.scss b/css/app-settings.scss
index 5e96ae0e64..0a07c66902 100644
--- a/css/app-settings.scss
+++ b/css/app-settings.scss
@@ -73,8 +73,9 @@
 				display: block;
 			}
 		}
-		
-		&--timezone {
+
+		&--timezone,
+		&--default-calendar {
 			width: 100%;
 		
 			.multiselect {
diff --git a/src/components/AppNavigation/Settings.vue b/src/components/AppNavigation/Settings.vue
index 1485934b6d..7194f62c99 100644
--- a/src/components/AppNavigation/Settings.vue
+++ b/src/components/AppNavigation/Settings.vue
@@ -20,7 +20,7 @@
   -->
 
 <template>
-	<AppNavigationSettings exclude-click-outside-classes="import-modal"
+	<AppNavigationSettings :exclude-click-outside-selectors="['.vs__dropdown-menu', '.modal-wrapper']"
 		:name="settingsTitle">
 		<ul class="settings-fieldset-interior">
 			<SettingsImportSection :is-disabled="loadingCalendars" />
@@ -71,6 +71,18 @@
 					label="label"
 					@option:selected="changeSlotDuration" />
 			</li>
+			<!-- TODO: remove version check once Nextcloud 28 is not supported anymore -->
+			<li v-if="currentUserPrincipal && defaultCalendarOptions.length > 1 && nextcloudVersion >= 29"
+				class="settings-fieldset-interior-item settings-fieldset-interior-item--default-calendar">
+				<label :for="defaultCalendarPickerId">
+					{{ $t('calendar', 'Default calendar for invitations and new events') }}
+				</label>
+				<CalendarPicker :value="defaultCalendar"
+					:calendars="defaultCalendarOptions"
+					:disabled="savingDefaultCalendarId"
+					:input-id="defaultCalendarPickerId"
+					@select-calendar="changeDefaultCalendar" />
+			</li>
 			<li class="settings-fieldset-interior-item settings-fieldset-interior-item--defaultReminder">
 				<label for="defaultReminder">{{ $t('calendar', 'Default reminder') }}</label>
 				<NcSelect :id="defaultReminder"
@@ -124,6 +136,8 @@ import {
 	NcAppNavigationSettings as AppNavigationSettings,
 	NcSelect,
 } from '@nextcloud/vue'
+import CalendarPicker from '../Shared/CalendarPicker.vue'
+
 import {
 	generateRemoteUrl,
 	generateUrl,
@@ -156,6 +170,9 @@ import ClipboardArrowLeftOutline from 'vue-material-design-icons/ClipboardArrowL
 import InformationVariant from 'vue-material-design-icons/InformationVariant.vue'
 import OpenInNewIcon from 'vue-material-design-icons/OpenInNew.vue'
 
+import logger from '../../utils/logger.js'
+import { randomId } from '../../utils/randomId.js'
+
 export default {
 	name: 'Settings',
 	components: {
@@ -171,6 +188,7 @@ export default {
 		ClipboardArrowLeftOutline,
 		InformationVariant,
 		OpenInNewIcon,
+		CalendarPicker,
 	},
 	props: {
 		loadingCalendars: {
@@ -186,14 +204,18 @@ export default {
 			savingPopover: false,
 			savingSlotDuration: false,
 			savingDefaultReminder: false,
+			savingDefaultCalendarId: false,
 			savingWeekend: false,
 			savingWeekNumber: false,
+			savingDefaultCalendar: false,
 			displayKeyboardShortcuts: false,
+			defaultCalendarPickerId: randomId(),
 		}
 	},
 	computed: {
 		...mapGetters({
 			birthdayCalendar: 'hasBirthdayCalendar',
+			currentUserPrincipal: 'getCurrentUserPrincipal',
 		}),
 		...mapState({
 			eventLimit: state => state.settings.eventLimit,
@@ -271,6 +293,28 @@ export default {
 		nextcloudVersion() {
 			return parseInt(OC.config.version.split('.')[0])
 		},
+		defaultCalendarOptions() {
+			return this.$store.state.calendars.calendars
+				.filter(calendar => !calendar.readOnly && !calendar.isSharedWithMe)
+		},
+		/**
+		 * The default calendar for new events and inivitations
+		 *
+		 * @return {object|undefined} The default calendar or undefined if none is available
+		 */
+		defaultCalendar() {
+			const defaultCalendarUrl = this.currentUserPrincipal.scheduleDefaultCalendarUrl
+			const calendar = this.defaultCalendarOptions
+				.find(calendar => calendar.url === defaultCalendarUrl)
+
+			// If the default calendar is not or no longer available,
+			// pick the first calendar in the list of available calendars.
+			if (!calendar) {
+				return this.defaultCalendarOptions[0]
+			}
+
+			return calendar
+		},
 	},
 	methods: {
 		async toggleBirthdayEnabled() {
@@ -396,6 +440,34 @@ export default {
 				this.savingDefaultReminder = false
 			}
 		},
+		/**
+		 * Changes the default calendar for new events
+		 *
+		 * @param {object} selectedCalendar The new selected default calendar
+		 */
+		async changeDefaultCalendar(selectedCalendar) {
+			if (!selectedCalendar) {
+				return
+			}
+
+			this.savingDefaultCalendar = true
+
+			try {
+				await this.$store.dispatch('changePrincipalScheduleDefaultCalendarUrl', {
+					principal: this.currentUserPrincipal,
+					scheduleDefaultCalendarUrl: selectedCalendar.url,
+				})
+			} catch (error) {
+				logger.error('Error while changing default calendar', {
+					error,
+					calendarUrl: selectedCalendar.url,
+					selectedCalendar,
+				})
+				showError(this.$t('calendar', 'Failed to save default calendar'))
+			} finally {
+				this.savingDefaultCalendar = false
+			}
+		},
 		/**
 		 * Copies the primary CalDAV url to the user's clipboard.
 		 */
diff --git a/src/components/Shared/CalendarPicker.vue b/src/components/Shared/CalendarPicker.vue
index 1adffe1a42..c6bb3f3c0c 100644
--- a/src/components/Shared/CalendarPicker.vue
+++ b/src/components/Shared/CalendarPicker.vue
@@ -1,6 +1,6 @@
 <template>
 	<NcSelect label="id"
-		input-id="url"
+		:input-id="inputId"
 		:disabled="isDisabled"
 		:options="options"
 		:value="valueIds"
@@ -25,6 +25,7 @@
 <script>
 import { NcSelect } from '@nextcloud/vue'
 import CalendarPickerOption from './CalendarPickerOption.vue'
+import { randomId } from '../../utils/randomId.js'
 
 export default {
 	name: 'CalendarPicker',
@@ -49,12 +50,20 @@ export default {
 			type: Boolean,
 			default: false,
 		},
+		disabled: {
+			type: Boolean,
+			default: false,
+		},
+		inputId: {
+			type: String,
+			default: () => randomId(),
+		},
 	},
 	computed: {
 		isDisabled() {
 			// for pickers where multiple can be selected (zero or more) we don't want to disable the picker
 			// for calendars where only one calendar can be selected, disable if there are < 2
-			return this.multiple ? this.calendars.length < 1 : this.calendars.length < 2
+			return this.disabled || (this.multiple ? this.calendars.length < 1 : this.calendars.length < 2)
 		},
 		valueIds() {
 			if (Array.isArray(this.value)) {
diff --git a/src/models/principal.js b/src/models/principal.js
index a1c238f04e..a8a44ccd11 100644
--- a/src/models/principal.js
+++ b/src/models/principal.js
@@ -65,6 +65,8 @@ const getDefaultPrincipalObject = (props) => Object.assign({}, {
 	isCalendarRoom: false,
 	// The id of the principal without prefix. e.g. userId / groupId / etc.
 	principalId: null,
+	// The url of the default calendar for invitations
+	scheduleDefaultCalendarUrl: null,
 }, props)
 
 /**
@@ -80,6 +82,7 @@ const mapDavToPrincipal = (dav) => {
 	const emailAddress = dav.email
 
 	const displayname = dav.displayname
+	const scheduleDefaultCalendarUrl = dav.scheduleDefaultCalendarUrl
 
 	const isUser = dav.principalScheme.startsWith(PRINCIPAL_PREFIX_USER)
 	const isGroup = dav.principalScheme.startsWith(PRINCIPAL_PREFIX_GROUP)
@@ -118,6 +121,7 @@ const mapDavToPrincipal = (dav) => {
 		isCalendarRoom,
 		principalId,
 		userId,
+		scheduleDefaultCalendarUrl,
 	})
 }
 
diff --git a/src/store/calendarObjects.js b/src/store/calendarObjects.js
index de40eb2aa1..ba7acebcfc 100644
--- a/src/store/calendarObjects.js
+++ b/src/store/calendarObjects.js
@@ -352,8 +352,13 @@ const actions = {
 			vObject.undirtify()
 		}
 
-		const firstCalendar = context.getters.sortedCalendars[0].id
-		return Promise.resolve(mapCalendarJsToCalendarObject(calendar, firstCalendar))
+		const defaultCalendarUrl = context.getters.getCurrentUserPrincipal.scheduleDefaultCalendarUrl
+		const defaultCalendar = context.getters.getCalendarByUrl(defaultCalendarUrl)
+
+		return Promise.resolve(mapCalendarJsToCalendarObject(
+			calendar,
+			defaultCalendar?.id ?? context.getters.sortedCalendars[0].id,
+		))
 	},
 
 	/**
diff --git a/src/store/calendars.js b/src/store/calendars.js
index 56b16bad64..f4af8b28b9 100644
--- a/src/store/calendars.js
+++ b/src/store/calendars.js
@@ -522,6 +522,14 @@ const getters = {
 	 */
 	getCalendarById: (state) => (calendarId) => state.calendarsById[calendarId],
 
+	/**
+	 * Gets a calendar by its url
+	 *
+	 * @param {object} state the store data
+	 * @return {function({String}): {Object}}
+	 */
+	getCalendarByUrl: (state) => (url) => state.calendars.find((calendar) => calendar.url === url),
+
 	/**
 	 * Gets the contact's birthday calendar or null
 	 *
diff --git a/src/store/principals.js b/src/store/principals.js
index 3bdf2f8170..c173bb22b8 100644
--- a/src/store/principals.js
+++ b/src/store/principals.js
@@ -66,6 +66,22 @@ const mutations = {
 	setCurrentUserPrincipal(state, { principalId }) {
 		state.currentUserPrincipal = principalId
 	},
+
+	/**
+	 * Changes the schedule-default-calendar-URL of a principal
+	 *
+	 * @param {object} state The vuex state
+	 * @param {object} data The destructuring object
+	 * @param {object} data.principal The principal to modify
+	 * @param {string} data.scheduleDefaultCalendarUrl The new schedule-default-calendar-URL
+	 */
+	changePrincipalScheduleDefaultCalendarUrl(state, { principal, scheduleDefaultCalendarUrl }) {
+		Vue.set(
+			state.principalsById[principal.id],
+			'scheduleDefaultCalendarUrl',
+			scheduleDefaultCalendarUrl,
+		)
+	},
 }
 
 const getters = {
@@ -147,6 +163,25 @@ const actions = {
 		context.commit('setCurrentUserPrincipal', { principalId: principal.id })
 		logger.debug(`Current user principal is ${principal.url}`)
 	},
+
+	/**
+	 * Change a principal's schedule-default-calendar-URL
+	 *
+	 * @param {object} context The vuex context
+	 * @param {object} data The destructuring object
+	 * @param {object} data.principal The principal to modify
+	 * @param {string} data.scheduleDefaultCalendarUrl The new schedule-default-calendar-URL
+	 * @return {Promise<void>}
+	 */
+	async changePrincipalScheduleDefaultCalendarUrl(context, { principal, scheduleDefaultCalendarUrl }) {
+		principal.dav.scheduleDefaultCalendarUrl = scheduleDefaultCalendarUrl
+
+		await principal.dav.update()
+		context.commit('changePrincipalScheduleDefaultCalendarUrl', {
+			principal,
+			scheduleDefaultCalendarUrl,
+		})
+	},
 }
 
 export default { state, mutations, getters, actions }
diff --git a/tests/javascript/unit/models/principal.test.js b/tests/javascript/unit/models/principal.test.js
index 3547014dc7..d3f2317179 100644
--- a/tests/javascript/unit/models/principal.test.js
+++ b/tests/javascript/unit/models/principal.test.js
@@ -40,6 +40,7 @@ describe('Test suite: Principal model (models/principal.js)', () => {
 			isCalendarResource: false,
 			isCalendarRoom: false,
 			principalId: null,
+			scheduleDefaultCalendarUrl: null,
 		})
 	})
 
@@ -63,6 +64,7 @@ describe('Test suite: Principal model (models/principal.js)', () => {
 			isCalendarRoom: false,
 			principalId: 'bar',
 			otherProp: 'foo',
+			scheduleDefaultCalendarUrl: null,
 		})
 	})