In the northern hemisphere, fall marks the transition between summer into winter, usually beginning in September and ending in November. As a former teacher, I have always thought about fall in terms of either going back to school or work, as well as the beginning of football season. It’s a great time of year to take a cruise vacation, and there are plenty of destinations to consider. Popular fall itineraries include Canada and New England, the Mediterranean, the Caribbean, and repositioning voyages.