<dependencies> <dependency> <groupId>net.time4j</groupId> <artifactId>time4j-core</artifactId> <version>4.38</version> </dependency> </dependencies> import net.time4j.Duration; import net.time4j.PlainDate; public class TimeDurationCalculation { public static void main(String[] args) { PlainDate startDate = PlainDate.of(2022, 1, 1); PlainDate endDate = PlainDate.of(2022, 5, 30); Duration duration = Duration.between(startDate, endDate); } }