How to make default time zone apply in Spring Boot Jackson Date serialization

I found myself with the same problem. In my case, I have only one timezone for my app, then adding:

spring.jackson.time-zone: America/Sao_Paulo

in my application.properties solved the problem.

Source: https://docs.spring.io/spring-boot/docs/current/reference/html/common-application-properties.html#JACKSON

Solved registering a Jackson2ObjectMapperBuilderCustomizer bean:

@Bean
public Jackson2ObjectMapperBuilderCustomizer jacksonObjectMapperCustomization() {
    return jacksonObjectMapperBuilder -> 
        jacksonObjectMapperBuilder.timeZone(TimeZone.getDefault());
}