@CreatedBy and @LastModifiedDate are no longer working with ZonedDateTime?

I had the same problem and could solve it adding a dateTimeProviderRef to @EnableJpaAuditing.

Java

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.auditing.DateTimeProvider;
import org.springframework.data.jpa.repository.config.EnableJpaAuditing;
import java.time.ZonedDateTime;
import java.util.Optional;

@Configuration
@EnableJpaAuditing(dateTimeProviderRef = "auditingDateTimeProvider")
public class PersistenceConfig {

    @Bean // Makes ZonedDateTime compatible with auditing fields
    public DateTimeProvider auditingDateTimeProvider() {
        return () -> Optional.of(ZonedDateTime.now());
    }

}

Kotlin

@Configuration
@EnableJpaAuditing(dateTimeProviderRef = "auditingDateTimeProvider")
class PersistenceConfig {

    @Bean // Makes ZonedDateTime compatible with auditing fields
    fun auditingDateTimeProvider()= DateTimeProvider { of(ZonedDateTime.now()) }

}