Require at least PHP 5.5.10 [#2870790]

added new date recur field with interactive widget. when adding include or exclude date the following error appear:
Warning: DateTime::setTimezone(): Can only do this for zones with ID for now in Drupal\date_recur\DateRecurDefaultRSet->_fixDates() (line 72 of modules/contrib/date_recur/src/DateRecurDefaultRSet.php).
Drupal\date_recur\DateRecurDefaultRSet->_fixDates('20170411T000000Z') (Line: 52)
Drupal\date_recur\DateRecurDefaultRSet->addExDate('20170411T000000Z') (Line: 99)
Drupal\date_recur\DateRecurRRule->__construct('RRULE:FREQ=WEEKLY;BYDAY=WE,SA
EXDATE:20170411T000000Z', Object) (Line: 187)
Drupal\date_recur\DateRecurRRule::validateRule('RRULE:FREQ=WEEKLY;BYDAY=WE,SA
EXDATE:20170411T000000Z', Object) (Line: 127)
Drupal\date_recur\Plugin\Field\FieldWidget\DateRecurDefaultWidget->validateRrule(Array, Object, Array)
call_user_func_array(Array, Array) (Line: 277)
Drupal\Core\Form\FormValidator->doValidateForm(Array, Object) (Line: 235)
Drupal\Core\Form\FormValidator->doValidateForm(Array, Object) (Line: 235)
Drupal\Core\Form\FormValidator->doValidateForm(Array, Object) (Line: 235)
Drupal\Core\Form\FormValidator->doValidateForm(Array, Object, 'node_tensorflow_wizard_edit_form') (Line: 119)
Drupal\Core\Form\FormValidator->validateForm('node_tensorflow_wizard_edit_form', Array, Object) (Line: 571)
Drupal\Core\Form\FormBuilder->processForm('node_tensorflow_wizard_edit_form', Array, Object) (Line: 314)
Drupal\Core\Form\FormBuilder->buildForm(Object, Object) (Line: 74)
Drupal\Core\Controller\FormController->getContentResult(Object, Object)
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 574)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 124)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}()
call_user_func_array(Object, Array) (Line: 144)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 64)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 57)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 99)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 78)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 50)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 656)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)
Warning: DateTime::setTimezone(): Can only do this for zones with ID for now in Drupal\date_recur\DateRecurDefaultRSet->_fixDates() (line 72 of modules/contrib/date_recur/src/DateRecurDefaultRSet.php).
Drupal\date_recur\DateRecurDefaultRSet->_fixDates('20170411T000000Z') (Line: 52)
Drupal\date_recur\DateRecurDefaultRSet->addExDate('20170411T000000Z') (Line: 99)
Drupal\date_recur\DateRecurRRule->__construct('RRULE:FREQ=WEEKLY;BYDAY=WE,SA
EXDATE:20170411T000000Z', Object) (Line: 147)
Drupal\date_recur\Plugin\Field\FieldWidget\DateRecurDefaultWidget->massageFormValues(Array, Array, Object) (Line: 368)
Drupal\Core\Field\WidgetBase->extractFormValues(Object, Array, Object) (Line: 222)
Drupal\Core\Entity\Entity\EntityFormDisplay->extractFormValues(Object, Array, Object) (Line: 307)
Drupal\Core\Entity\ContentEntityForm->copyFormValuesToEntity(Object, Array, Object) (Line: 291)
Drupal\Core\Entity\EntityForm->buildEntity(Array, Object) (Line: 147)
Drupal\Core\Entity\ContentEntityForm->buildEntity(Array, Object) (Line: 178)
Drupal\Core\Entity\ContentEntityForm->validateForm(Array, Object)
call_user_func_array(Array, Array) (Line: 83)
Drupal\Core\Form\FormValidator->executeValidateHandlers(Array, Object) (Line: 270)
Drupal\Core\Form\FormValidator->doValidateForm(Array, Object, 'node_tensorflow_wizard_edit_form') (Line: 119)
Drupal\Core\Form\FormValidator->validateForm('node_tensorflow_wizard_edit_form', Array, Object) (Line: 571)
Drupal\Core\Form\FormBuilder->processForm('node_tensorflow_wizard_edit_form', Array, Object) (Line: 314)
Drupal\Core\Form\FormBuilder->buildForm(Object, Object) (Line: 74)
Drupal\Core\Controller\FormController->getContentResult(Object, Object)
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 574)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 124)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}()
call_user_func_array(Object, Array) (Line: 144)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 64)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 57)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 99)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 78)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 50)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 656)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)
Warning: DateTime::setTimezone(): Can only do this for zones with ID for now in Drupal\date_recur\DateRecurDefaultRSet->_fixDates() (line 72 of modules/contrib/date_recur/src/DateRecurDefaultRSet.php).
Drupal\date_recur\DateRecurDefaultRSet->_fixDates('20170411T000000Z') (Line: 52)
Drupal\date_recur\DateRecurDefaultRSet->addExDate('20170411T000000Z') (Line: 99)
Drupal\date_recur\DateRecurRRule->__construct('RRULE:FREQ=WEEKLY;BYDAY=WE,SA
EXDATE:20170411T000000Z', Object) (Line: 147)
Drupal\date_recur\Plugin\Field\FieldWidget\DateRecurDefaultWidget->massageFormValues(Array, Array, Object) (Line: 368)
Drupal\Core\Field\WidgetBase->extractFormValues(Object, Array, Object) (Line: 222)
Drupal\Core\Entity\Entity\EntityFormDisplay->extractFormValues(Object, Array, Object) (Line: 307)
Drupal\Core\Entity\ContentEntityForm->copyFormValuesToEntity(Object, Array, Object) (Line: 291)
Drupal\Core\Entity\EntityForm->buildEntity(Array, Object) (Line: 147)
Drupal\Core\Entity\ContentEntityForm->buildEntity(Array, Object) (Line: 276)
Drupal\Core\Entity\EntityForm->submitForm(Array, Object) (Line: 137)
Drupal\Core\Entity\ContentEntityForm->submitForm(Array, Object)
call_user_func_array(Array, Array) (Line: 111)
Drupal\Core\Form\FormSubmitter->executeSubmitHandlers(Array, Object) (Line: 51)
Drupal\Core\Form\FormSubmitter->doSubmitForm(Array, Object) (Line: 585)
Drupal\Core\Form\FormBuilder->processForm('node_tensorflow_wizard_edit_form', Array, Object) (Line: 314)
Drupal\Core\Form\FormBuilder->buildForm(Object, Object) (Line: 74)
Drupal\Core\Controller\FormController->getContentResult(Object, Object)
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 574)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 124)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}()
call_user_func_array(Object, Array) (Line: 144)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 64)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 57)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 99)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 78)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 50)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 656)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)
Warning: DateTime::setTimezone(): Can only do this for zones with ID for now in Drupal\date_recur\DateRecurDefaultRSet->_fixDates() (line 72 of modules/contrib/date_recur/src/DateRecurDefaultRSet.php).
Drupal\date_recur\DateRecurDefaultRSet->_fixDates('20170411T000000Z') (Line: 52)
Drupal\date_recur\DateRecurDefaultRSet->addExDate('20170411T000000Z') (Line: 99)
Drupal\date_recur\DateRecurRRule->__construct('RRULE:FREQ=WEEKLY;BYDAY=WE,SA
EXDATE:20170411T000000Z', Object, Object, 'UTC') (Line: 104)
Drupal\date_recur\Plugin\DateRecurOccurrenceHandler\DefaultDateRecurOccurrenceHandler->init(Object) (Line: 182)
Drupal\date_recur\Plugin\Field\FieldType\DateRecurItem->getOccurrenceHandler() (Line: 201)
Drupal\date_recur\Plugin\Field\FieldType\DateRecurItem->preSave() (Line: 244)
Drupal\Core\Field\FieldItemList->delegateMethod('preSave') (Line: 202)
Drupal\Core\Field\FieldItemList->preSave() (Line: 479)
Drupal\Core\Entity\ContentEntityStorageBase->invokeFieldMethod('preSave', Object) (Line: 429)
Drupal\Core\Entity\ContentEntityStorageBase->invokeHook('presave', Object) (Line: 435)
Drupal\Core\Entity\EntityStorageBase->doPreSave(Object) (Line: 298)
Drupal\Core\Entity\ContentEntityStorageBase->doPreSave(Object) (Line: 389)
Drupal\Core\Entity\EntityStorageBase->save(Object) (Line: 761)
Drupal\Core\Entity\Sql\SqlContentEntityStorage->save(Object) (Line: 364)
Drupal\Core\Entity\Entity->save() (Line: 286)
Drupal\node\NodeForm->save(Array, Object)
call_user_func_array(Array, Array) (Line: 111)
Drupal\Core\Form\FormSubmitter->executeSubmitHandlers(Array, Object) (Line: 51)
Drupal\Core\Form\FormSubmitter->doSubmitForm(Array, Object) (Line: 585)
Drupal\Core\Form\FormBuilder->processForm('node_tensorflow_wizard_edit_form', Array, Object) (Line: 314)
Drupal\Core\Form\FormBuilder->buildForm(Object, Object) (Line: 74)
Drupal\Core\Controller\FormController->getContentResult(Object, Object)
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 574)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 124)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}()
call_user_func_array(Object, Array) (Line: 144)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 64)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 57)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 99)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 78)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 50)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 656)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)
Warning: DateTime::setTimezone(): Can only do this for zones with ID for now in Drupal\date_recur\DateRecurDefaultRSet->_fixDates() (line 72 of modules/contrib/date_recur/src/DateRecurDefaultRSet.php).
Drupal\date_recur\DateRecurDefaultRSet->_fixDates('20170411T000000Z') (Line: 52)
Drupal\date_recur\DateRecurDefaultRSet->addExDate('20170411T000000Z') (Line: 99)
Drupal\date_recur\DateRecurRRule->__construct('RRULE:FREQ=WEEKLY;BYDAY=WE,SA
EXDATE:20170411T000000Z', Object, Object, 'UTC') (Line: 104)
Drupal\date_recur\Plugin\DateRecurOccurrenceHandler\DefaultDateRecurOccurrenceHandler->init(Object) (Line: 182)
Drupal\date_recur\Plugin\Field\FieldType\DateRecurItem->getOccurrenceHandler() (Line: 16)
Drupal\date_recur\Plugin\Field\FieldType\DateRecurFieldItemList->postSave(1)
call_user_func_array(Array, Array) (Line: 479)
Drupal\Core\Entity\ContentEntityStorageBase->invokeFieldMethod('postSave', Object, 1) (Line: 511)
Drupal\Core\Entity\ContentEntityStorageBase->invokeFieldPostSave(Object, 1) (Line: 437)
Drupal\Core\Entity\ContentEntityStorageBase->invokeHook('update', Object) (Line: 470)
Drupal\Core\Entity\EntityStorageBase->doPostSave(Object, 1) (Line: 326)
Drupal\Core\Entity\ContentEntityStorageBase->doPostSave(Object, 1) (Line: 395)
Drupal\Core\Entity\EntityStorageBase->save(Object) (Line: 761)
Drupal\Core\Entity\Sql\SqlContentEntityStorage->save(Object) (Line: 364)
Drupal\Core\Entity\Entity->save() (Line: 286)
Drupal\node\NodeForm->save(Array, Object)
call_user_func_array(Array, Array) (Line: 111)
Drupal\Core\Form\FormSubmitter->executeSubmitHandlers(Array, Object) (Line: 51)
Drupal\Core\Form\FormSubmitter->doSubmitForm(Array, Object) (Line: 585)
Drupal\Core\Form\FormBuilder->processForm('node_tensorflow_wizard_edit_form', Array, Object) (Line: 314)
Drupal\Core\Form\FormBuilder->buildForm(Object, Object) (Line: 74)
Drupal\Core\Controller\FormController->getContentResult(Object, Object)
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 574)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 124)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}()
call_user_func_array(Object, Array) (Line: 144)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 64)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 57)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 99)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 78)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 50)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 656)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)