diff --git a/src/Inputs/DateInput.php b/src/Inputs/DateInput.php
index e237308..d559bc3 100644
--- a/src/Inputs/DateInput.php
+++ b/src/Inputs/DateInput.php
@@ -55,11 +55,27 @@ public function __construct($label = null, ?int $maxLength = null)
 
 		parent::__construct($label, null);
 
-		$this->addRule(fn (Control $input) => DateTimeFormat::validate($this->format, $input->getValue()), $this->invalidFormatMessage);
+		// must be a static callable, otherwise Nette::exportRules() stops at this rule
+		// and every rule/condition added later is missing in data-nette-rules
+		$this->addRule([self::class, 'validateFormat'], $this->invalidFormatMessage);
 
 		$this->setFormat(static::$defaultFormat);
 	}
 
+	/**
+	 * Checks that the value matches the control's format.
+	 *
+	 * Kept as a public static method (instead of a closure) so that the rule is exportable
+	 * and does not cut off the rules that follow it. The client side has no validator of
+	 * this name and simply skips it.
+	 */
+	public static function validateFormat(Control $input): bool
+	{
+		assert($input instanceof self);
+
+		return DateTimeFormat::validate($input->getFormat(), $input->getValue());
+	}
+
 	/**
 	 * @inheritdoc
 	 */
diff --git a/tests/Inputs/DateInputTest.php b/tests/Inputs/DateInputTest.php
index 04582dd..7123b0b 100644
--- a/tests/Inputs/DateInputTest.php
+++ b/tests/Inputs/DateInputTest.php
@@ -5,16 +5,20 @@
 use Contributte\FormsBootstrap\BootstrapForm;
 use Contributte\FormsBootstrap\Enums\DateTimeFormat;
 use Contributte\FormsBootstrap\Inputs\DateInput;
+use Nette\Forms\Form;
 use Tests\BaseTestCase;
 
 class DateInputTest extends BaseTestCase
 {
 
+	// rule that DateInput adds in its constructor
+	private const FORMAT_RULE = '[{"op":"Contributte\\\\FormsBootstrap\\\\Inputs\\\\DateInput::validateFormat","msg":"invalid/incorrect format"}]';
+
 	public function testDefaultDate(): void
 	{
 		$form = new BootstrapForm();
 		$dt = $form->addBootstrapDate('date', 'Date');
-		$this->assertEquals('<input type="text" name="date" id="frm-date" class="form-control" placeholder="d.m.yyyy (31.12.1998)">', $dt->getControl()->render());
+		$this->assertEquals('<input type="text" name="date" id="frm-date" data-nette-rules=\'' . self::FORMAT_RULE . '\' class="form-control" placeholder="d.m.yyyy (31.12.1998)">', $dt->getControl()->render());
 	}
 
 	public function testWithCustomStaticFormat(): void
@@ -22,7 +26,26 @@ public function testWithCustomStaticFormat(): void
 		$form = new BootstrapForm();
 		DateInput::$defaultFormat = DateTimeFormat::D_YMD_DASHES;
 		$dt = $form->addBootstrapDate('date', 'Date');
-		$this->assertEquals('<input type="text" name="date" id="frm-date" class="form-control" placeholder="yyyy-mm-dd (1998-12-31)">', $dt->getControl()->render());
+		$this->assertEquals('<input type="text" name="date" id="frm-date" data-nette-rules=\'' . self::FORMAT_RULE . '\' class="form-control" placeholder="yyyy-mm-dd (1998-12-31)">', $dt->getControl()->render());
+	}
+
+	/**
+	 * @see https://github.com/contributte/forms-bootstrap/issues/61
+	 */
+	public function testConditionsAreExported(): void
+	{
+		$form = new BootstrapForm();
+		$checkbox = $form->addCheckbox('agree', 'Agree');
+		$date = $form->addBootstrapDate('date', 'Date');
+		$date->addConditionOn($checkbox, Form::Equal, true)
+			->setRequired('Date is required');
+		$date->addCondition(Form::Filled)
+			->addRule(Form::MinLength, 'Too short', 3);
+
+		$rules = $date->getControl()->render();
+		$this->assertStringContainsString(':equal', $rules);
+		$this->assertStringContainsString(':filled', $rules);
+		$this->assertStringContainsString(':minLength', $rules);
 	}
 
 }
diff --git a/tests/Inputs/DateTimeInputTest.php b/tests/Inputs/DateTimeInputTest.php
index 9867dd2..0ec9b23 100644
--- a/tests/Inputs/DateTimeInputTest.php
+++ b/tests/Inputs/DateTimeInputTest.php
@@ -11,11 +11,14 @@
 class DateTimeInputTest extends BaseTestCase
 {
 
+	// rule that DateInput adds in its constructor
+	private const FORMAT_RULE = '[{"op":"Contributte\\\\FormsBootstrap\\\\Inputs\\\\DateInput::validateFormat","msg":"invalid/incorrect format"}]';
+
 	public function testDefaultDateTime(): void
 	{
 		$form = new BootstrapForm();
 		$dt = $form->addBootstrapDateTime('datetime', 'Date and time');
-		$this->assertEquals('<input type="text" name="datetime" id="frm-datetime" class="form-control" placeholder="d.m.yyyy h:mm (31.12.1998 23:59)">', $dt->getControl()->render());
+		$this->assertEquals('<input type="text" name="datetime" id="frm-datetime" data-nette-rules=\'' . self::FORMAT_RULE . '\' class="form-control" placeholder="d.m.yyyy h:mm (31.12.1998 23:59)">', $dt->getControl()->render());
 	}
 
 	public function testDefaultAdditionalClasses(): void
@@ -24,7 +27,7 @@ public function testDefaultAdditionalClasses(): void
 		DateTimeInput::$additionalHtmlClasses[] = 'datetimepicker';
 		DateTimeInput::$additionalHtmlClasses[] = 'cool';
 		$dt = $form->addBootstrapDateTime('datetime', 'Date and time');
-		$this->assertEquals('<input type="text" name="datetime" id="frm-datetime" class="form-control datetimepicker cool" placeholder="d.m.yyyy h:mm (31.12.1998 23:59)">', $dt->getControl()->render());
+		$this->assertEquals('<input type="text" name="datetime" id="frm-datetime" data-nette-rules=\'' . self::FORMAT_RULE . '\' class="form-control datetimepicker cool" placeholder="d.m.yyyy h:mm (31.12.1998 23:59)">', $dt->getControl()->render());
 	}
 
 	public function testNotMessingHtmlClassOfDateAndDateTime(): void
@@ -62,4 +65,27 @@ public function testValidationWithCorrectFormat(): void
 		$this->assertEquals(new DateTime('2020-05-01'), $dt->getValue());
 	}
 
+	public function testValidationWithIncorrectFormat(): void
+	{
+		$form = new BootstrapForm();
+		$dt = $form->addBootstrapDateTime('datetime', 'Date and time');
+		$dt->setValue('not a date at all');
+		$submit = $form->addSubmit('send');
+		$form->setSubmittedBy($submit);
+		$form->validate();
+		$this->assertFalse($form->isValid());
+		$this->assertSame([$dt->invalidFormatMessage], $dt->getErrors());
+	}
+
+	public function testEmptyOptionalValueDoesNotFailValidation(): void
+	{
+		$form = new BootstrapForm();
+		$dt = $form->addBootstrapDateTime('datetime', 'Date and time');
+		$submit = $form->addSubmit('send');
+		$form->setSubmittedBy($submit);
+		$form->validate();
+		$this->assertTrue($form->isValid());
+		$this->assertSame([], $dt->getErrors());
+	}
+
 }