Gigasecond.java

import java.time.LocalDate;
import java.time.LocalDateTime;

class Gigasecond {

    Gigasecond(LocalDate birthDate) {
        throw new UnsupportedOperationException("Delete this statement and write your own implementation.");
    }

    Gigasecond(LocalDateTime birthDateTime) {
        throw new UnsupportedOperationException("Delete this statement and write your own implementation.");
    }

    LocalDateTime getDate() {
        throw new UnsupportedOperationException("Delete this statement and write your own implementation.");
    }

}