diff --git a/apps/dav/appinfo/info.xml b/apps/dav/appinfo/info.xml
index 60e38f55c69e9..c7bccb99cfb4e 100644
--- a/apps/dav/appinfo/info.xml
+++ b/apps/dav/appinfo/info.xml
@@ -46,6 +46,7 @@
 	<commands>
 		<command>OCA\DAV\Command\CreateAddressBook</command>
 		<command>OCA\DAV\Command\CreateCalendar</command>
+		<command>OCA\DAV\Command\DeleteCalendar</command>
 		<command>OCA\DAV\Command\MoveCalendar</command>
 		<command>OCA\DAV\Command\ListCalendars</command>
 		<command>OCA\DAV\Command\SendEventReminders</command>
diff --git a/apps/dav/composer/composer/autoload_classmap.php b/apps/dav/composer/composer/autoload_classmap.php
index fe6c6ab3253e1..f1f0a4f0d2d74 100644
--- a/apps/dav/composer/composer/autoload_classmap.php
+++ b/apps/dav/composer/composer/autoload_classmap.php
@@ -104,6 +104,7 @@
     'OCA\\DAV\\CardDAV\\Xml\\Groups' => $baseDir . '/../lib/CardDAV/Xml/Groups.php',
     'OCA\\DAV\\Command\\CreateAddressBook' => $baseDir . '/../lib/Command/CreateAddressBook.php',
     'OCA\\DAV\\Command\\CreateCalendar' => $baseDir . '/../lib/Command/CreateCalendar.php',
+    'OCA\\DAV\\Command\\DeleteCalendar' => $baseDir . '/../lib/Command/DeleteCalendar.php',
     'OCA\\DAV\\Command\\ListCalendars' => $baseDir . '/../lib/Command/ListCalendars.php',
     'OCA\\DAV\\Command\\MoveCalendar' => $baseDir . '/../lib/Command/MoveCalendar.php',
     'OCA\\DAV\\Command\\RemoveInvalidShares' => $baseDir . '/../lib/Command/RemoveInvalidShares.php',
diff --git a/apps/dav/composer/composer/autoload_static.php b/apps/dav/composer/composer/autoload_static.php
index 48e453b72f7f7..b142cd4d3deec 100644
--- a/apps/dav/composer/composer/autoload_static.php
+++ b/apps/dav/composer/composer/autoload_static.php
@@ -119,6 +119,7 @@ class ComposerStaticInitDAV
         'OCA\\DAV\\CardDAV\\Xml\\Groups' => __DIR__ . '/..' . '/../lib/CardDAV/Xml/Groups.php',
         'OCA\\DAV\\Command\\CreateAddressBook' => __DIR__ . '/..' . '/../lib/Command/CreateAddressBook.php',
         'OCA\\DAV\\Command\\CreateCalendar' => __DIR__ . '/..' . '/../lib/Command/CreateCalendar.php',
+        'OCA\\DAV\\Command\\DeleteCalendar' => __DIR__ . '/..' . '/../lib/Command/DeleteCalendar.php',
         'OCA\\DAV\\Command\\ListCalendars' => __DIR__ . '/..' . '/../lib/Command/ListCalendars.php',
         'OCA\\DAV\\Command\\MoveCalendar' => __DIR__ . '/..' . '/../lib/Command/MoveCalendar.php',
         'OCA\\DAV\\Command\\RemoveInvalidShares' => __DIR__ . '/..' . '/../lib/Command/RemoveInvalidShares.php',
diff --git a/apps/dav/lib/Command/DeleteCalendar.php b/apps/dav/lib/Command/DeleteCalendar.php
new file mode 100644
index 0000000000000..52abf2c8cecdb
--- /dev/null
+++ b/apps/dav/lib/Command/DeleteCalendar.php
@@ -0,0 +1,117 @@
+<?php
+
+declare(strict_types=1);
+/**
+ *
+ * @copyright Copyright (c) 2021, Mattia Narducci (mattianarducci1@gmail.com)
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCA\DAV\Command;
+
+use OCA\DAV\CalDAV\BirthdayService;
+use OCA\DAV\CalDAV\CalDavBackend;
+use OCP\IConfig;
+use OCP\IUserManager;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+
+class DeleteCalendar extends Command {
+	/** @var CalDavBackend */
+	private $calDav;
+
+	/** @var IConfig */
+	private $config;
+
+	/** @var IUserManager */
+	private $userManager;
+
+	/**
+	 * @param CalDavBackend $calDav
+	 * @param IConfig $config
+	 * @param IUserManager $userManager
+	 */
+	public function __construct(
+		CalDavBackend $calDav,
+		IConfig $config,
+		IUserManager $userManager
+	) {
+		parent::__construct();
+		$this->calDav = $calDav;
+		$this->config = $config;
+		$this->userManager = $userManager;
+	}
+
+	protected function configure() {
+		$this
+			->setName('dav:delete-calendar')
+			->setDescription('Delete a dav calendar')
+			->addArgument('uid',
+				InputArgument::REQUIRED,
+				'User who owns the calendar')
+			->addArgument('name',
+				InputArgument::OPTIONAL,
+				'Name of the calendar to delete')
+			->addOption('birthday',
+				null,
+				InputOption::VALUE_NONE,
+				'Delete the birthday calendar');
+	}
+
+	protected function execute(
+		InputInterface $input,
+		OutputInterface $output
+	): int {
+		$user = $input->getArgument('uid');
+		if (!$this->userManager->userExists($user)) {
+			throw new \InvalidArgumentException(
+				'User <' . $user . '> is unknown.');
+		}
+
+		$birthday = $input->getOption('birthday');
+		if ($birthday !== false) {
+			$name = BirthdayService::BIRTHDAY_CALENDAR_URI;
+		} else {
+			$name = $input->getArgument('name');
+			if (!$name) {
+				throw new \InvalidArgumentException(
+					'Please specify a calendar name or --birthday');
+			}
+		}
+
+		$calendar = $this->calDav->getCalendarByUri(
+			'principals/users/' . $user,
+			$name);
+		if ($calendar === null) {
+			throw new \InvalidArgumentException(
+				'User <' . $user . '> has no calendar named <' . $name . '>. You can run occ dav:list-calendars to list calendars URIs for this user.');
+		}
+
+		if ($name === BirthdayService::BIRTHDAY_CALENDAR_URI) {
+			$this->config->setUserValue($user,
+				'dav', 'generateBirthdayCalendar', 'no');
+		}
+
+		$this->calDav->deleteCalendar($calendar['id']);
+
+		return 0;
+	}
+}
diff --git a/apps/dav/tests/unit/Command/DeleteCalendarTest.php b/apps/dav/tests/unit/Command/DeleteCalendarTest.php
new file mode 100644
index 0000000000000..c03ce76f9840e
--- /dev/null
+++ b/apps/dav/tests/unit/Command/DeleteCalendarTest.php
@@ -0,0 +1,204 @@
+<?php
+
+declare(strict_types=1);
+/**
+ *
+ * @copyright Copyright (c) 2021, Mattia Narducci (mattianarducci1@gmail.com)
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCA\DAV\Tests\Command;
+
+use OCA\DAV\CalDAV\BirthdayService;
+use OCA\DAV\CalDav\CalDavBackend;
+use OCA\DAV\Command\DeleteCalendar;
+use OCP\IConfig;
+use OCP\IUserManager;
+use PHPUnit\Framework\MockObject\MockObject;
+use Symfony\Component\Console\Tester\CommandTester;
+use Test\TestCase;
+
+/**
+ * Class DeleteCalendarTest
+ *
+ * @package OCA\DAV\Tests\Command
+ */
+class DeleteCalendarTest extends TestCase {
+	public const USER = 'user';
+	public const NAME = 'calendar';
+
+	/** @var CalDavBackend|MockObject */
+	private $calDav;
+
+	/** @var IConfig|MockObject */
+	private $config;
+
+	/** @var IUserManager|MockObject */
+	private $userManager;
+
+	/** @var DeleteCalendar */
+	private $command;
+
+	protected function setUp(): void {
+		parent::setUp();
+
+		$this->calDav = $this->createMock(CalDavBackend::class);
+		$this->config = $this->createMock(IConfig::class);
+		$this->userManager = $this->createMock(IUserManager::class);
+
+		$this->command = new DeleteCalendar(
+			$this->calDav,
+			$this->config,
+			$this->userManager,
+		);
+	}
+
+	public function testInvalidUser() {
+		$this->expectException(\InvalidArgumentException::class);
+		$this->expectExceptionMessage(
+			'User <' . self::USER . '> is unknown.');
+
+		$this->userManager->expects($this->once())
+			->method('userExists')
+			->with(self::USER)
+			->willReturn(false);
+
+		$commandTester = new CommandTester($this->command);
+		$commandTester->execute([
+			'uid' => self::USER,
+			'name' => self::NAME,
+		]);
+	}
+
+	public function testNoCalendarName() {
+		$this->expectException(\InvalidArgumentException::class);
+		$this->expectExceptionMessage(
+			'Please specify a calendar name or --birthday');
+
+		$this->userManager->expects($this->once())
+			->method('userExists')
+			->with(self::USER)
+			->willReturn(true);
+
+		$commandTester = new CommandTester($this->command);
+		$commandTester->execute([
+			'uid' => self::USER,
+		]);
+	}
+
+	public function testInvalidCalendar() {
+		$this->expectException(\InvalidArgumentException::class);
+		$this->expectExceptionMessage(
+			'User <' . self::USER . '> has no calendar named <' . self::NAME .  '>.');
+
+		$this->userManager->expects($this->once())
+			->method('userExists')
+			->with(self::USER)
+			->willReturn(true);
+		$this->calDav->expects($this->once())
+			->method('getCalendarByUri')
+			->with(
+				'principals/users/' . self::USER,
+				self::NAME
+			)
+			->willReturn(null);
+
+		$commandTester = new CommandTester($this->command);
+		$commandTester->execute([
+			'uid' => self::USER,
+			'name' => self::NAME,
+		]);
+	}
+
+	public function testDelete() {
+		$id = 1234;
+
+		$this->userManager->expects($this->once())
+			->method('userExists')
+			->with(self::USER)
+			->willReturn(true);
+		$this->calDav->expects($this->once())
+			->method('getCalendarByUri')
+			->with(
+				'principals/users/' . self::USER,
+				self::NAME
+			)
+			->willReturn(['id' => $id]);
+		$this->calDav->expects($this->once())
+			->method('deleteCalendar')
+			->with($id);
+
+		$commandTester = new CommandTester($this->command);
+		$commandTester->execute([
+			'uid' => self::USER,
+			'name' => self::NAME,
+		]);
+	}
+
+	public function testDeleteBirthday() {
+		$id = 1234;
+
+		$this->userManager->expects($this->once())
+			->method('userExists')
+			->with(self::USER)
+			->willReturn(true);
+		$this->calDav->expects($this->once())
+			->method('getCalendarByUri')
+			->with(
+				'principals/users/' . self::USER,
+				BirthdayService::BIRTHDAY_CALENDAR_URI
+			)
+			->willReturn(['id' => $id]);
+		$this->config->expects($this->once())
+			->method('setUserValue')
+			->with(
+				self::USER,
+				'dav', 'generateBirthdayCalendar', 'no'
+			);
+		$this->calDav->expects($this->once())
+			->method('deleteCalendar')
+			->with($id);
+
+		$commandTester = new CommandTester($this->command);
+		$commandTester->execute([
+			'uid' => self::USER,
+			'--birthday' => true,
+		]);
+	}
+
+	public function testBirthdayHasPrecedence() {
+		$this->userManager->expects($this->once())
+			->method('userExists')
+			->with(self::USER)
+			->willReturn(true);
+		$this->calDav->expects($this->once())
+			->method('getCalendarByUri')
+			->with(
+				'principals/users/' . self::USER,
+				BirthdayService::BIRTHDAY_CALENDAR_URI
+			)
+			->willReturn(['id' => 1234]);
+
+		$commandTester = new CommandTester($this->command);
+		$commandTester->execute([
+			'uid' => self::USER,
+			'name' => self::NAME,
+			'--birthday' => true,
+		]);
+	}
+}