diff --git a/Tests/Validator/BirthdateValidatorTest.php b/Tests/Validator/BirthdateValidatorTest.php
new file mode 100644
index 000000000..94f1347a5
--- /dev/null
+++ b/Tests/Validator/BirthdateValidatorTest.php
@@ -0,0 +1,112 @@
+<?php
+
+/*
+ * Copyright (C) 2015 Julien Fastré <julien.fastre@champs-libres.coop>
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+namespace Chill\PersonBundle\Tests\Validator;
+
+use Chill\PersonBundle\Validator\Constraints\BirthdateValidator;
+use Chill\PersonBundle\Validator\Constraints\Birthdate;
+use Prophecy\Argument;
+use Prophecy\Prophet;
+
+/**
+ * Test the behaviour of BirthdayValidator
+ *
+ * @author Julien Fastré <julien.fastre@champs-libres.coop>
+ */
+class BirthdateValidatorTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * A prophecy for \Symfony\Component\Validator\Context\ExecutionContextInterface
+     *
+     * Will reveal \Symfony\Component\Validator\Context\ExecutionContextInterface
+     */
+    private $context;
+    
+    private $prophet;
+    
+    /**
+     *
+     * @var Birthdate
+     */
+    private $constraint;
+    
+    public function setUp()
+    {
+        $this->prophet = new Prophet;
+        
+        $constraintViolationBuilder = $this->prophet->prophesize();
+        $constraintViolationBuilder->willImplement('Symfony\Component\Validator\Violation\ConstraintViolationBuilderInterface');
+
+        $constraintViolationBuilder->setParameter(Argument::any(), Argument::any())
+                ->willReturn($constraintViolationBuilder->reveal());
+        $constraintViolationBuilder->addViolation()
+                ->willReturn($constraintViolationBuilder->reveal());
+        
+        $this->context = $this->prophet->prophesize();
+        $this->context->willImplement('Symfony\Component\Validator\Context\ExecutionContextInterface');
+        $this->context->buildViolation(Argument::type('string'))
+                ->willReturn($constraintViolationBuilder->reveal()); 
+        
+        $this->constraint = new Birthdate();
+    }
+    
+    public function testValidBirthDate()
+    {
+        
+        $date = new \DateTime('2015-01-01');
+        
+        $birthdateValidator = new BirthdateValidator();
+        $birthdateValidator->initialize($this->context->reveal());
+        
+        $birthdateValidator->validate($date, $this->constraint);
+        
+        $this->context->buildViolation(Argument::any())->shouldNotHaveBeenCalled();
+    }
+    
+    public function testInvalidBirthDate()
+    {
+        $date = new \DateTime('tomorrow');
+        
+        $birthdateValidator = new BirthdateValidator();
+        $birthdateValidator->initialize($this->context->reveal());
+        
+        $birthdateValidator->validate($date, $this->constraint);
+        
+        $this->context->buildViolation(Argument::type('string'))->shouldHaveBeenCalled();
+    }
+    
+    public function testInvalidBirthDateWithParameter()
+    {
+        $date = (new \DateTime('today'))->sub(new \DateInterval('P1M'));
+        
+        $birthdateValidator = new BirthdateValidator('P1Y');
+        $birthdateValidator->initialize($this->context->reveal());
+        
+        $birthdateValidator->validate($date, $this->constraint);
+        
+        $this->context->buildViolation(Argument::type('string'))->shouldHaveBeenCalled();
+    }
+    
+    public function tearDown()
+    {
+        $this->prophet->checkPredictions();
+    }
+    
+    
+}
diff --git a/Validator/Constraints/Birthdate.php b/Validator/Constraints/Birthdate.php
new file mode 100644
index 000000000..35ad118df
--- /dev/null
+++ b/Validator/Constraints/Birthdate.php
@@ -0,0 +1,37 @@
+<?php
+
+/*
+ * Copyright (C) 2015 Julien Fastré <julien.fastre@champs-libres.coop>
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+namespace Chill\PersonBundle\Validator\Constraints;
+
+use Symfony\Component\Validator\Constraint;
+
+/**
+ * Create a constraint on birth date: the birthdate after today are not allowed.
+ * 
+ * It is possible to add a delay before today, expressed as described in 
+ * interval_spec : http://php.net/manual/en/dateinterval.construct.php
+ * (this interval_spec itself is based on ISO8601 :
+ *  https://en.wikipedia.org/wiki/ISO_8601#Durations)
+ *
+ * @author Julien Fastré <julien.fastre@champs-libres.coop>
+ */
+class Birthdate extends Constraint
+{
+    public $message = "The birthdate must be before %date%";
+}
diff --git a/Validator/Constraints/BirthdateValidator.php b/Validator/Constraints/BirthdateValidator.php
new file mode 100644
index 000000000..5f65c3ed7
--- /dev/null
+++ b/Validator/Constraints/BirthdateValidator.php
@@ -0,0 +1,70 @@
+<?php
+
+/*
+ * Copyright (C) 2015 Julien Fastré <julien.fastre@champs-libres.coop>
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+namespace Chill\PersonBundle\Validator\Constraints;
+
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\ConstraintValidator;
+
+/**
+ * 
+ *
+ * @author Julien Fastré <julien.fastre@champs-libres.coop>
+ */
+class BirthdateValidator extends ConstraintValidator
+{
+    private $interval_spec = null;
+    
+    public function __construct($interval_spec = null)
+    {
+        $this->interval_spec = $interval_spec;
+    }
+    
+    public function validate($value, Constraint $constraint)
+    {
+        if (!$value instanceof \DateTime) {
+            throw new \LogicException('The input should a be a \DateTime interface,'
+                    . (is_object($value) ? get_class($value) : gettype($value)));
+        }
+        
+        $limitDate = $this->getLimitDate();
+        
+        if ($limitDate < $value) {
+            $this->context->buildViolation($constraint->message)
+                ->setParameter('%date%', $value->format(\DateTime::ATOM))
+                ->addViolation();
+        }
+        
+    }
+    
+    /**
+     * 
+     * @return \DateTime
+     */
+    private function getLimitDate()
+    {
+        if ($this->interval_spec !== NULL) {
+            $interval = new \DateInterval($this->interval_spec);
+            return (new \DateTime('now'))->sub($interval);
+        } else {
+            return (new \DateTime('now'));
+        }
+    }
+
+}