Hello everybody,
When I want to store LocalTime and OffsetTime into a Time column with the hibernate.jdbc.time_zone set on "UTC" the value is not correctly handle if we are on a Daylight Saving Time period.

Consider this entity :

@Entity
@Table(name = "avdev_myData")
public class MyData implements Serializable {

    private static final long serialVersionUID = 1L;

    @Id
    private Long id;

    @Column(name = "local_time")
    private LocalTime localTime;
}

Add this in your configuration :

<property name="hibernate.jdbc.time_zone" value="UTC"/>

Add a new row with a local Time at 12:00pm

        MyData myData = new MyData();
        myData.setId(1L);
        myData.setLocalTime(LocalTime.of(12, 0));

        entityManager.persist(myData);
        entityManager.getTransaction().commit();

The value expected is: 10:00am
The actual value is: 11:00am

Change with Instant object and Timestamp column make it working as expected and the value stored is "My time minus 2 hours". Because we are on a DST period, the transformation for LocalTime into UTC values are not handle properly and the DST is ignored.

We can reproduced this with both LocalTime and OffsetTime objects.
I have a full test case from Hibernate templates here : https://github.com/avdev4j/hiberntae_utc_localTime

Just launch the storeLocalTimeShouldReturnWithAnUtcValue() unit test.

Hope it can help this option because it's very usefull.
It's my first report, if you need more informations please tell me .