Java tutorial
import java.time.Duration; import java.time.Period; import java.time.ZoneId; import java.time.ZonedDateTime; public class Main { public static void main(String[] args) { ZonedDateTime _130AMChicagoTime = ZonedDateTime.of(2014, 3, 9, 1, 30, 0, 0, ZoneId.of("America/Chicago")); System.out.println(_130AMChicagoTime.plusHours(3)); System.out.println(_130AMChicagoTime.plus(Duration.ofHours(3))); System.out.println(_130AMChicagoTime.plus(Duration.ofDays(2))); System.out.println(_130AMChicagoTime.plus(Period.ofDays(2))); } }