diff --git a/src/Entity/Project.php b/src/Entity/Project.php
index 852b2183..4ed1b55f 100644
--- a/src/Entity/Project.php
+++ b/src/Entity/Project.php
@@ -36,7 +36,6 @@ class Project implements EntityWithMetaFields
      * @ORM\GeneratedValue(strategy="IDENTITY")
      */
     private $id;
-
     /**
      * @var Customer
      *
@@ -45,7 +44,6 @@ class Project implements EntityWithMetaFields
      * @Assert\NotNull()
      */
     private $customer;
-
     /**
      * @var string
      *
@@ -56,7 +54,6 @@ class Project implements EntityWithMetaFields
      * @Assert\Length(min=2, max=150)
      */
     private $name;
-
     /**
      * @var string
      *
@@ -64,14 +61,18 @@ class Project implements EntityWithMetaFields
      * @Assert\Length(max=20)
      */
     private $orderNumber;
-
+    /**
+     * @var \DateTime
+     *
+     * @ORM\Column(name="order_date", type="datetime", nullable=true)
+     */
+    private $orderDate;
     /**
      * @var string
      *
      * @ORM\Column(name="comment", type="text", nullable=true)
      */
     private $comment;
-
     /**
      * @var bool
      *
@@ -172,32 +173,37 @@ class Project implements EntityWithMetaFields
     }
 
     /**
-     * @deprecated since 1.4
+     * @deprecated since 1.4, use isVisible() instead
      */
     public function getVisible(): bool
     {
         return $this->visible;
     }
 
-    /**
-     * @return string|null
-     */
     public function getOrderNumber(): ?string
     {
         return $this->orderNumber;
     }
 
-    /**
-     * @param string $orderNumber
-     * @return Project
-     */
-    public function setOrderNumber($orderNumber): Project
+    public function setOrderNumber(?string $orderNumber): Project
     {
         $this->orderNumber = $orderNumber;
 
         return $this;
     }
 
+    public function getOrderDate(): ?\DateTime
+    {
+        return $this->orderDate;
+    }
+
+    public function setOrderDate(?\DateTime $orderDate): Project
+    {
+        $this->orderDate = $orderDate;
+
+        return $this;
+    }
+
     /**
      * @internal only here for symfony forms
      * @return Collection|MetaTableTypeInterface[]
diff --git a/src/Form/ProjectEditForm.php b/src/Form/ProjectEditForm.php
index ff8ce7df..5403801f 100644
--- a/src/Form/ProjectEditForm.php
+++ b/src/Form/ProjectEditForm.php
@@ -12,6 +12,7 @@ namespace App\Form;
 use App\Entity\Customer;
 use App\Entity\Project;
 use App\Form\Type\CustomerType;
+use App\Form\Type\DateTimePickerType;
 use App\Repository\CustomerRepository;
 use App\Repository\Query\CustomerFormTypeQuery;
 use Symfony\Component\Form\AbstractType;
@@ -58,6 +59,10 @@ class ProjectEditForm extends AbstractType
                 'label' => 'label.orderNumber',
                 'required' => false,
             ])
+            ->add('orderDate', DateTimePickerType::class, [
+                'label' => 'label.orderDate',
+                'required' => false,
+            ])
             ->add('customer', CustomerType::class, [
                 'query_builder' => function (CustomerRepository $repo) use ($builder, $customer) {
                     $query = new CustomerFormTypeQuery($customer);
diff --git a/src/Migrations/Version20191024100951.php b/src/Migrations/Version20191024100951.php
new file mode 100644
index 00000000..4a226b51
--- /dev/null
+++ b/src/Migrations/Version20191024100951.php
@@ -0,0 +1,55 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the Kimai time-tracking app.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace DoctrineMigrations;
+
+use App\Doctrine\AbstractMigration;
+use Doctrine\DBAL\Schema\Schema;
+
+/**
+ * Adds the order_date column to the projects table.
+ *
+ * @version 1.5
+ */
+final class Version20191024100951 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Adds the order_date column to the projects table';
+    }
+
+    protected function isSupportingForeignKeys(): bool
+    {
+        return false;
+    }
+
+    public function isTransactional(): bool
+    {
+        if ($this->isPlatformSqlite()) {
+            // does fail if we use transactions, as tables are re-created and foreign keys would fail
+            return false;
+        }
+
+        return true;
+    }
+
+    public function up(Schema $schema): void
+    {
+        $projects = $schema->getTable('kimai2_projects');
+        $projects->addColumn('order_date', 'datetime', ['notnull' => false]);
+    }
+
+    public function down(Schema $schema): void
+    {
+        $projects = $schema->getTable('kimai2_projects');
+        $projects->dropColumn('order_date');
+    }
+}
diff --git a/tests/Entity/ProjectTest.php b/tests/Entity/ProjectTest.php
index 9cd0736b..615515f5 100644
--- a/tests/Entity/ProjectTest.php
+++ b/tests/Entity/ProjectTest.php
@@ -24,22 +24,24 @@ class ProjectTest extends TestCase
     public function testDefaultValues()
     {
         $sut = new Project();
-        $this->assertNull($sut->getId());
-        $this->assertNull($sut->getCustomer());
-        $this->assertNull($sut->getName());
-        $this->assertNull($sut->getOrderNumber());
-        $this->assertNull($sut->getComment());
-        $this->assertTrue($sut->getVisible());
-        $this->assertNull($sut->getFixedRate());
-        $this->assertNull($sut->getHourlyRate());
-        $this->assertNull($sut->getColor());
-        $this->assertEquals(0.0, $sut->getBudget());
-        $this->assertEquals(0, $sut->getTimeBudget());
-        $this->assertInstanceOf(Collection::class, $sut->getMetaFields());
-        $this->assertEquals(0, $sut->getMetaFields()->count());
-        $this->assertNull($sut->getMetaField('foo'));
-        $this->assertInstanceOf(Collection::class, $sut->getTeams());
-        $this->assertEquals(0, $sut->getTeams()->count());
+        self::assertNull($sut->getId());
+        self::assertNull($sut->getCustomer());
+        self::assertNull($sut->getName());
+        self::assertNull($sut->getOrderNumber());
+        self::assertNull($sut->getOrderDate());
+        self::assertNull($sut->getComment());
+        self::assertTrue($sut->getVisible());
+        self::assertTrue($sut->isVisible());
+        self::assertNull($sut->getFixedRate());
+        self::assertNull($sut->getHourlyRate());
+        self::assertNull($sut->getColor());
+        self::assertEquals(0.0, $sut->getBudget());
+        self::assertEquals(0, $sut->getTimeBudget());
+        self::assertInstanceOf(Collection::class, $sut->getMetaFields());
+        self::assertEquals(0, $sut->getMetaFields()->count());
+        self::assertNull($sut->getMetaField('foo'));
+        self::assertInstanceOf(Collection::class, $sut->getTeams());
+        self::assertEquals(0, $sut->getTeams()->count());
     }
 
     public function testSetterAndGetter()
@@ -47,35 +49,41 @@ class ProjectTest extends TestCase
         $sut = new Project();
 
         $customer = (new Customer())->setName('customer');
-        $this->assertInstanceOf(Project::class, $sut->setCustomer($customer));
-        $this->assertSame($customer, $sut->getCustomer());
+        self::assertInstanceOf(Project::class, $sut->setCustomer($customer));
+        self::assertSame($customer, $sut->getCustomer());
 
-        $this->assertInstanceOf(Project::class, $sut->setName('123456789'));
-        $this->assertEquals('123456789', (string) $sut);
+        self::assertInstanceOf(Project::class, $sut->setName('123456789'));
+        self::assertEquals('123456789', (string) $sut);
 
-        $this->assertInstanceOf(Project::class, $sut->setOrderNumber('123456789'));
-        $this->assertEquals('123456789', $sut->getOrderNumber());
+        self::assertInstanceOf(Project::class, $sut->setOrderNumber('123456789'));
+        self::assertEquals('123456789', $sut->getOrderNumber());
 
-        $this->assertInstanceOf(Project::class, $sut->setComment('a comment'));
-        $this->assertEquals('a comment', $sut->getComment());
+        $dateTime = new \DateTime('-1 year');
+        self::assertInstanceOf(Project::class, $sut->setOrderDate($dateTime));
+        self::assertSame($dateTime, $sut->getOrderDate());
+        self::assertInstanceOf(Project::class, $sut->setOrderDate(null));
+        self::assertNull($sut->getOrderDate());
 
-        $this->assertInstanceOf(Project::class, $sut->setColor('#fffccc'));
-        $this->assertEquals('#fffccc', $sut->getColor());
+        self::assertInstanceOf(Project::class, $sut->setComment('a comment'));
+        self::assertEquals('a comment', $sut->getComment());
 
-        $this->assertInstanceOf(Project::class, $sut->setVisible(false));
-        $this->assertFalse($sut->getVisible());
+        self::assertInstanceOf(Project::class, $sut->setColor('#fffccc'));
+        self::assertEquals('#fffccc', $sut->getColor());
 
-        $this->assertInstanceOf(Project::class, $sut->setFixedRate(13.47));
-        $this->assertEquals(13.47, $sut->getFixedRate());
+        self::assertInstanceOf(Project::class, $sut->setVisible(false));
+        self::assertFalse($sut->getVisible());
 
-        $this->assertInstanceOf(Project::class, $sut->setHourlyRate(99));
-        $this->assertEquals(99, $sut->getHourlyRate());
+        self::assertInstanceOf(Project::class, $sut->setFixedRate(13.47));
+        self::assertEquals(13.47, $sut->getFixedRate());
 
-        $this->assertInstanceOf(Project::class, $sut->setBudget(12345.67));
-        $this->assertEquals(12345.67, $sut->getBudget());
+        self::assertInstanceOf(Project::class, $sut->setHourlyRate(99));
+        self::assertEquals(99, $sut->getHourlyRate());
 
-        $this->assertInstanceOf(Project::class, $sut->setTimeBudget(937321));
-        $this->assertEquals(937321, $sut->getTimeBudget());
+        self::assertInstanceOf(Project::class, $sut->setBudget(12345.67));
+        self::assertEquals(12345.67, $sut->getBudget());
+
+        self::assertInstanceOf(Project::class, $sut->setTimeBudget(937321));
+        self::assertEquals(937321, $sut->getTimeBudget());
     }
 
     public function testMetaFields()
@@ -83,7 +91,7 @@ class ProjectTest extends TestCase
         $sut = new Project();
         $meta = new ProjectMeta();
         $meta->setName('foo')->setValue('bar')->setType('test');
-        $this->assertInstanceOf(Project::class, $sut->setMetaField($meta));
+        self::assertInstanceOf(Project::class, $sut->setMetaField($meta));
         self::assertEquals(1, $sut->getMetaFields()->count());
         $result = $sut->getMetaField('foo');
         self::assertSame($result, $meta);
@@ -91,7 +99,7 @@ class ProjectTest extends TestCase
 
         $meta2 = new ProjectMeta();
         $meta2->setName('foo')->setValue('bar')->setType('test2');
-        $this->assertInstanceOf(Project::class, $sut->setMetaField($meta2));
+        self::assertInstanceOf(Project::class, $sut->setMetaField($meta2));
         self::assertEquals(1, $sut->getMetaFields()->count());
         self::assertCount(0, $sut->getVisibleMetaFields());
 
diff --git a/translations/messages.de.xliff b/translations/messages.de.xliff
index 9a830b7c..3f04ca39 100644
--- a/translations/messages.de.xliff
+++ b/translations/messages.de.xliff
@@ -868,6 +868,10 @@
                 <source>label.orderNumber</source>
                 <target>Bestellnummer</target>
             </trans-unit>
+            <trans-unit id="label.orderDate">
+                <source>label.orderDate</source>
+                <target>Bestelldatum</target>
+            </trans-unit>
             <trans-unit id="label.invoice_tax_number">
                 <source>label.invoice_tax_number</source>
                 <target>USt-IdNr.:</target>
diff --git a/translations/messages.en.xliff b/translations/messages.en.xliff
index 781b1b68..9988695f 100644
--- a/translations/messages.en.xliff
+++ b/translations/messages.en.xliff
@@ -868,6 +868,10 @@
                 <source>label.orderNumber</source>
                 <target>Order number</target>
             </trans-unit>
+            <trans-unit id="label.orderDate">
+                <source>label.orderDate</source>
+                <target>Order date</target>
+            </trans-unit>
             <trans-unit id="label.invoice_tax_number">
                 <source>label.invoice_tax_number</source>
                 <target>VAT no.:</target>
diff --git a/var/data/kimai_test.sqlite b/var/data/kimai_test.sqlite
index 449c3cd8..c72080bf 100644
Binary files a/var/data/kimai_test.sqlite and b/var/data/kimai_test.sqlite differ