Does a PPL require a specific rating or endorsement for night VFR in the US? Night flying seems like a special challenge and I'd think the FAA would want you to show that you've had proper training for it. This question talks about currency requirements, but I can't find anything on a night VFR endorsement.
(2) Except as provided in §61.110 of this part, 3 hours of night flight training in a single-engine airplane that includes—
(i) One cross-country flight of over 100 nautical miles total distance; and
(ii) 10 takeoffs and 10 landings to a full stop (with each landing involving a flight in the traffic pattern) at an airport.
Some very minimal instrument training is also required, which can be helpful at night:
(3) 3 hours of flight training in a single-engine airplane on the control and maneuvering of an airplane solely by reference to instruments, including straight and level flight, constant airspeed climbs and descents, turns to a heading, recovery from unusual flight attitudes, radio communications, and the use of navigation systems/facilities and radar services appropriate to instrument flight;
That all applies to private pilots; sport pilots may not fly at night. And as David pointed out, there is an exception to the night requirements under 61.110 for pilots in Alaska: they can skip the night training but if they do, they can't fly at night.