<https://javadeveloperzone.com/spring-boot/spring-gson-custom-date-or-long-format/#webpage>
<http://schema.org/datePublished>
"2019-03-19T18:43:39+00:00"^^<http://schema.org/Date>
<https://javadeveloperzone.com/spring-boot/spring-gson-custom-date-or-long-format/>