diff --git a/src/Symfony/Component/Validator/Constraints/Timezone.php b/src/Symfony/Component/Validator/Constraints/Timezone.php
new file mode 100644
index 0000000000000..485e14b602a63
--- /dev/null
+++ b/src/Symfony/Component/Validator/Constraints/Timezone.php
@@ -0,0 +1,49 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Validator\Constraints;
+
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\Exception\ConstraintDefinitionException;
+
+/**
+ * @Annotation
+ * @Target({"PROPERTY", "METHOD", "ANNOTATION"})
+ *
+ * @author Javier Spagnoletti <phansys@gmail.com>
+ */
+class Timezone extends Constraint
+{
+    const NO_SUCH_TIMEZONE_ERROR = '45de6628-3479-46d6-a210-00ad584f530a';
+    const NO_SUCH_TIMEZONE_IN_ZONE_ERROR = 'b57767b1-36c0-40ac-a3d7-629420c775b8';
+    const NO_SUCH_TIMEZONE_IN_COUNTRY_ERROR = 'c4a22222-dc92-4fc0-abb0-d95b268c7d0b';
+    public $zone = \DateTimeZone::ALL;
+    public $countryCode;
+    public $message = 'This value is not a valid timezone.';
+
+    protected static $errorNames = array(
+        self::NO_SUCH_TIMEZONE_ERROR => 'NO_SUCH_TIMEZONE_ERROR',
+        self::NO_SUCH_TIMEZONE_IN_ZONE_ERROR => 'NO_SUCH_TIMEZONE_IN_ZONE_ERROR',
+        self::NO_SUCH_TIMEZONE_IN_COUNTRY_ERROR => 'NO_SUCH_TIMEZONE_IN_COUNTRY_ERROR',
+    );
+
+    /**
+     * {@inheritdoc}
+     */
+    public function __construct(array $options = null)
+    {
+        parent::__construct($options);
+
+        if ($this->countryCode && \DateTimeZone::PER_COUNTRY !== $this->zone) {
+            throw new ConstraintDefinitionException('The option "countryCode" can only be used when "zone" option has `\DateTimeZone::PER_COUNTRY` as value');
+        }
+    }
+}
diff --git a/src/Symfony/Component/Validator/Constraints/TimezoneValidator.php b/src/Symfony/Component/Validator/Constraints/TimezoneValidator.php
new file mode 100644
index 0000000000000..88030595d5e93
--- /dev/null
+++ b/src/Symfony/Component/Validator/Constraints/TimezoneValidator.php
@@ -0,0 +1,95 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Validator\Constraints;
+
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\ConstraintValidator;
+use Symfony\Component\Validator\Exception\UnexpectedTypeException;
+
+/**
+ * Validates whether a value is a valid timezone identifier.
+ *
+ * @author Javier Spagnoletti <phansys@gmail.com>
+ */
+class TimezoneValidator extends ConstraintValidator
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function validate($value, Constraint $constraint)
+    {
+        if (!$constraint instanceof Timezone) {
+            throw new UnexpectedTypeException($constraint, __NAMESPACE__.'\Timezone');
+        }
+
+        if (null === $value || '' === $value) {
+            return;
+        }
+
+        if (!is_scalar($value) && !(\is_object($value) && method_exists($value, '__toString'))) {
+            throw new UnexpectedTypeException($value, 'string');
+        }
+
+        $value = (string) $value;
+
+        // @see: https://bugs.php.net/bug.php?id=75928
+        if ($constraint->countryCode) {
+            $timezoneIds = \DateTimeZone::listIdentifiers($constraint->zone, $constraint->countryCode);
+        } else {
+            $timezoneIds = \DateTimeZone::listIdentifiers($constraint->zone);
+        }
+
+        if ($timezoneIds && !\in_array($value, $timezoneIds, true)) {
+            if ($constraint->countryCode) {
+                $code = Timezone::NO_SUCH_TIMEZONE_IN_COUNTRY_ERROR;
+            } elseif (\DateTimeZone::ALL !== $constraint->zone) {
+                $code = Timezone::NO_SUCH_TIMEZONE_IN_ZONE_ERROR;
+            } else {
+                $code = Timezone::NO_SUCH_TIMEZONE_ERROR;
+            }
+
+            $this->context->buildViolation($constraint->message)
+                ->setParameter('{{ value }}', $this->formatValue($value))
+                ->setCode($code)
+                ->addViolation();
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getDefaultOption()
+    {
+        return 'zone';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function formatValue($value, $format = 0)
+    {
+        $value = parent::formatValue($value, $format);
+        if ($value) {
+            if (\DateTimeZone::PER_COUNTRY !== $value) {
+                $r = new \ReflectionClass(\DateTimeZone::class);
+                $consts = $r->getConstants();
+                if ($zoneFound = array_search($value, $consts, true)) {
+                    return $zoneFound;
+                }
+
+                return $value;
+            }
+        }
+
+        return $value;
+    }
+}
diff --git a/src/Symfony/Component/Validator/Resources/translations/validators.en.xlf b/src/Symfony/Component/Validator/Resources/translations/validators.en.xlf
index 4bb2760b418e3..ce058b2a3587a 100644
--- a/src/Symfony/Component/Validator/Resources/translations/validators.en.xlf
+++ b/src/Symfony/Component/Validator/Resources/translations/validators.en.xlf
@@ -326,6 +326,10 @@
                 <source>This value should be a multiple of {{ compared_value }}.</source>
                 <target>This value should be a multiple of {{ compared_value }}.</target>
             </trans-unit>
+            <trans-unit id="85">
+                <source>This value is not a valid timezone.</source>
+                <target>This value is not a valid timezone.</target>
+            </trans-unit>
         </body>
     </file>
 </xliff>
diff --git a/src/Symfony/Component/Validator/Resources/translations/validators.es.xlf b/src/Symfony/Component/Validator/Resources/translations/validators.es.xlf
index 18eb8f4ca2da3..989f14592e280 100644
--- a/src/Symfony/Component/Validator/Resources/translations/validators.es.xlf
+++ b/src/Symfony/Component/Validator/Resources/translations/validators.es.xlf
@@ -326,6 +326,10 @@
                 <source>This value should be a multiple of {{ compared_value }}.</source>
                 <target>Este valor debería ser un múltiplo de {{ compared_value }}.</target>
             </trans-unit>
+            <trans-unit id="85">
+                <source>This value is not a valid timezone.</source>
+                <target>Este valor no es una zona horaria válida.</target>
+            </trans-unit>
         </body>
     </file>
 </xliff>
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/TimezoneTest.php b/src/Symfony/Component/Validator/Tests/Constraints/TimezoneTest.php
new file mode 100644
index 0000000000000..cd9e556a8885e
--- /dev/null
+++ b/src/Symfony/Component/Validator/Tests/Constraints/TimezoneTest.php
@@ -0,0 +1,63 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Validator\Tests\Constraints;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Validator\Constraints\Timezone;
+
+/**
+ * @author Javier Spagnoletti <phansys@gmail.com>
+ */
+class TimezoneTest extends TestCase
+{
+    public function testValidTimezoneConstraints()
+    {
+        $constraint = new Timezone();
+
+        $constraint = new Timezone(array(
+            'message' => 'myMessage',
+            'zone' => \DateTimeZone::PER_COUNTRY,
+            'countryCode' => 'AR',
+        ));
+
+        $constraint = new Timezone(array(
+            'message' => 'myMessage',
+            'zone' => \DateTimeZone::ALL,
+        ));
+
+        // Make an assertion in order to avoid this test to be marked as risky
+        $this->assertInstanceOf(Timezone::class, $constraint);
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Validator\Exception\ConstraintDefinitionException
+     */
+    public function testExceptionForGroupedTimezonesByCountryWithWrongTimezone()
+    {
+        $constraint = new Timezone(array(
+            'message' => 'myMessage',
+            'zone' => \DateTimeZone::ALL,
+            'countryCode' => 'AR',
+        ));
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Validator\Exception\ConstraintDefinitionException
+     */
+    public function testExceptionForGroupedTimezonesByCountryWithoutTimezone()
+    {
+        $constraint = new Timezone(array(
+            'message' => 'myMessage',
+            'countryCode' => 'AR',
+        ));
+    }
+}
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/TimezoneValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/TimezoneValidatorTest.php
new file mode 100644
index 0000000000000..41422e31d92db
--- /dev/null
+++ b/src/Symfony/Component/Validator/Tests/Constraints/TimezoneValidatorTest.php
@@ -0,0 +1,261 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Validator\Tests\Constraints;
+
+use Symfony\Component\Validator\Constraints\Timezone;
+use Symfony\Component\Validator\Constraints\TimezoneValidator;
+use Symfony\Component\Validator\Test\ConstraintValidatorTestCase;
+
+/**
+ * @author Javier Spagnoletti <phansys@gmail.com>
+ */
+class TimezoneValidatorTest extends ConstraintValidatorTestCase
+{
+    protected function createValidator(): TimezoneValidator
+    {
+        return new TimezoneValidator();
+    }
+
+    public function testNullIsValid()
+    {
+        $this->validator->validate(null, new Timezone());
+
+        $this->assertNoViolation();
+    }
+
+    public function testEmptyStringIsValid()
+    {
+        $this->validator->validate('', new Timezone());
+
+        $this->assertNoViolation();
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Validator\Exception\UnexpectedTypeException
+     */
+    public function testExpectsStringCompatibleType()
+    {
+        $this->validator->validate(new \stdClass(), new Timezone());
+    }
+
+    /**
+     * @dataProvider getValidTimezones
+     */
+    public function testValidTimezones(string $timezone)
+    {
+        $this->validator->validate($timezone, new Timezone());
+
+        $this->assertNoViolation();
+    }
+
+    public function getValidTimezones(): iterable
+    {
+        return array(
+            array('America/Argentina/Buenos_Aires'),
+            array('America/Barbados'),
+            array('Antarctica/Syowa'),
+            array('Africa/Douala'),
+            array('Atlantic/Canary'),
+            array('Asia/Gaza'),
+            array('Europe/Copenhagen'),
+        );
+    }
+
+    /**
+     * @dataProvider getValidGroupedTimezones
+     */
+    public function testValidGroupedTimezones(string $timezone, int $what)
+    {
+        $constraint = new Timezone(array(
+            'zone' => $what,
+        ));
+
+        $this->validator->validate($timezone, $constraint);
+
+        $this->assertNoViolation();
+    }
+
+    public function getValidGroupedTimezones(): iterable
+    {
+        return array(
+            array('America/Argentina/Cordoba', \DateTimeZone::AMERICA),
+            array('America/Barbados', \DateTimeZone::AMERICA),
+            array('Africa/Cairo', \DateTimeZone::AFRICA),
+            array('Atlantic/Cape_Verde', \DateTimeZone::ATLANTIC),
+            array('Europe/Bratislava', \DateTimeZone::EUROPE),
+            array('Indian/Christmas', \DateTimeZone::INDIAN),
+            array('Pacific/Kiritimati', \DateTimeZone::ALL),
+            array('Pacific/Kiritimati', \DateTimeZone::ALL_WITH_BC),
+            array('Pacific/Kiritimati', \DateTimeZone::PACIFIC),
+            array('Arctic/Longyearbyen', \DateTimeZone::ARCTIC),
+            array('Asia/Beirut', \DateTimeZone::ASIA),
+            array('Atlantic/Bermuda', \DateTimeZone::ASIA | \DateTimeZone::ATLANTIC),
+            array('Atlantic/Azores', \DateTimeZone::ATLANTIC | \DateTimeZone::ASIA),
+        );
+    }
+
+    /**
+     * @dataProvider getInvalidTimezones
+     */
+    public function testInvalidTimezonesWithoutZone(string $timezone)
+    {
+        $constraint = new Timezone(array(
+            'message' => 'myMessage',
+        ));
+
+        $this->validator->validate($timezone, $constraint);
+
+        $this->buildViolation('myMessage')
+            ->setParameter('{{ value }}', '"'.$timezone.'"')
+            ->setCode(Timezone::NO_SUCH_TIMEZONE_ERROR)
+            ->assertRaised();
+    }
+
+    public function getInvalidTimezones(): iterable
+    {
+        return array(
+            array('Buenos_Aires/Argentina/America'),
+            array('Mayotte/Indian'),
+            array('foobar'),
+        );
+    }
+
+    /**
+     * @dataProvider getInvalidGroupedTimezones
+     */
+    public function testInvalidGroupedTimezones(string $timezone, int $what)
+    {
+        $constraint = new Timezone(array(
+            'zone' => $what,
+            'message' => 'myMessage',
+        ));
+
+        $this->validator->validate($timezone, $constraint);
+
+        $this->buildViolation('myMessage')
+            ->setParameter('{{ value }}', '"'.$timezone.'"')
+            ->setCode(Timezone::NO_SUCH_TIMEZONE_IN_ZONE_ERROR)
+            ->assertRaised();
+    }
+
+    public function getInvalidGroupedTimezones(): iterable
+    {
+        return array(
+            array('Antarctica/McMurdo', \DateTimeZone::AMERICA),
+            array('America/Barbados', \DateTimeZone::ANTARCTICA),
+            array('Europe/Kiev', \DateTimeZone::ARCTIC),
+            array('Asia/Ho_Chi_Minh', \DateTimeZone::INDIAN),
+            array('Asia/Ho_Chi_Minh', \DateTimeZone::INDIAN | \DateTimeZone::ANTARCTICA),
+        );
+    }
+
+    /**
+     * @dataProvider getValidGroupedTimezonesByCountry
+     */
+    public function testValidGroupedTimezonesByCountry(string $timezone, int $what, string $country)
+    {
+        $constraint = new Timezone(array(
+            'zone' => $what,
+            'countryCode' => $country,
+        ));
+
+        $this->validator->validate($timezone, $constraint);
+
+        $this->assertNoViolation();
+    }
+
+    public function getValidGroupedTimezonesByCountry(): iterable
+    {
+        return array(
+            array('America/Argentina/Cordoba', \DateTimeZone::PER_COUNTRY, 'AR'),
+            array('America/Barbados', \DateTimeZone::PER_COUNTRY, 'BB'),
+            array('Africa/Cairo', \DateTimeZone::PER_COUNTRY, 'EG'),
+            array('Atlantic/Cape_Verde', \DateTimeZone::PER_COUNTRY, 'CV'),
+            array('Europe/Bratislava', \DateTimeZone::PER_COUNTRY, 'SK'),
+            array('Indian/Christmas', \DateTimeZone::PER_COUNTRY, 'CX'),
+            array('Pacific/Kiritimati', \DateTimeZone::PER_COUNTRY, 'KI'),
+            array('Pacific/Kiritimati', \DateTimeZone::PER_COUNTRY, 'KI'),
+            array('Pacific/Kiritimati', \DateTimeZone::PER_COUNTRY, 'KI'),
+            array('Arctic/Longyearbyen', \DateTimeZone::PER_COUNTRY, 'SJ'),
+            array('Asia/Beirut', \DateTimeZone::PER_COUNTRY, 'LB'),
+            array('Atlantic/Bermuda', \DateTimeZone::PER_COUNTRY, 'BM'),
+            array('Atlantic/Azores', \DateTimeZone::PER_COUNTRY, 'PT'),
+        );
+    }
+
+    /**
+     * @dataProvider getInvalidGroupedTimezonesByCountry
+     */
+    public function testInvalidGroupedTimezonesByCountry(string $timezone, int $what, string $country)
+    {
+        $constraint = new Timezone(array(
+            'message' => 'myMessage',
+            'zone' => $what,
+            'countryCode' => $country,
+        ));
+
+        $this->validator->validate($timezone, $constraint);
+
+        $this->buildViolation('myMessage')
+            ->setParameter('{{ value }}', '"'.$timezone.'"')
+            ->setCode(Timezone::NO_SUCH_TIMEZONE_IN_COUNTRY_ERROR)
+            ->assertRaised();
+    }
+
+    public function getInvalidGroupedTimezonesByCountry(): iterable
+    {
+        return array(
+            array('America/Argentina/Cordoba', \DateTimeZone::PER_COUNTRY, 'FR'),
+            array('America/Barbados', \DateTimeZone::PER_COUNTRY, 'PT'),
+        );
+    }
+
+    /**
+     * @dataProvider getDeprecatedTimezones
+     */
+    public function testDeprecatedTimezonesAreVaildWithBC(string $timezone)
+    {
+        $constraint = new Timezone(array(
+            'zone' => \DateTimeZone::ALL_WITH_BC,
+        ));
+
+        $this->validator->validate($timezone, $constraint);
+
+        $this->assertNoViolation();
+    }
+
+    /**
+     * @dataProvider getDeprecatedTimezones
+     */
+    public function testDeprecatedTimezonesAreInvaildWithoutBC(string $timezone)
+    {
+        $constraint = new Timezone(array(
+            'message' => 'myMessage',
+        ));
+
+        $this->validator->validate($timezone, $constraint);
+
+        $this->buildViolation('myMessage')
+            ->setParameter('{{ value }}', '"'.$timezone.'"')
+            ->setCode(Timezone::NO_SUCH_TIMEZONE_ERROR)
+            ->assertRaised();
+    }
+
+    public function getDeprecatedTimezones(): iterable
+    {
+        return array(
+            array('America/Buenos_Aires'),
+            array('Etc/GMT'),
+            array('US/Pacific'),
+        );
+    }
+}