I have a field from an entity that is a time type (Doctrine type). So when I save a time in the database (through Symfony 2.1.7 using Form) it save the data in the following format:

HH:mm:ss ie. 13:30:00

This time is save in UTC using the model_timezone option. When fetching the data from the database, it display the time back in the user timezone thanks to view_timezone option.

If I'm right, this is performed thanks to the data transformer: DateTimeToStringTransformer

Here is my full field definition:

$builder
    ->add('time', 'time', array(
        'widget' => 'single_text',
        'label' => 'form.time',
        'translation_domain' => 'AcmeDemoBundle',
        'error_bubbling' => true,
        'attr' => array('class' => 'time-picker'),
        'model_timezone' => 'UTC',
        'view_timezone' => $this->options['user_timezone']
    ))
    ;

The problem is the following: I think because the date is not saved in the database, the Datetime object is built using the a default date which is 1970-01-01. When converting the time in the user timezone, the Datetime object is calculating the difference regarding the daylight saving of the Jan 1st, 1970 which is not returning the excepted time.

ie. I enter 03:00 using America\Los_Angeles timezone, it's saving 11:00 in the database which is correct. But when reloading the form, it display 02:00 (-1 hour daylight saving). I would expect to get the same data I've entered previously in the form which means 03:00

Useful tool to see timezone's time correspondance: http://www.worldtimebuddy.com/