//Part of Date.cpp
bool Date::operator<(const Date& otherDate) {
   //A date is less than another date if is earlier
   bool result=false; //assume false until proven true
   if(year<otherDate.year) result=true;
   else if(year==otherDate.year && month<otherDate.month) result=true;
   else if(year==otherDate.year && month==otherDate.month && day<otherDate.day) result=true;
   return result;
}//operator

bool Date::operator>(const Date& otherDate) {
   //Convert both dates to Julian and compare the Julian dates
   int jd1=julian();
   int jd2=otherDate.julian();
   return jd1>jd2;
}//operator