What is the minimum fuel reserve required under VFR regulations during day or night?

Under VFR (Visual Flight Rules) regulations, the minimum fuel reserve requirement is that the pilot must have enough fuel to fly for at least 20 minutes at normal cruise speed after reaching the destination or alternate airport. This regulation is designed to ensure that the pilot has sufficient fuel to handle unforeseen circumstances, such as delays or the need to divert to an alternate airport due to weather or other factors.

At night or during the day, having this minimum fuel reserve helps ensure a margin of safety for the flight, contributing to decision-making capabilities in case of unexpected situations. Hence, pilots trained in VFR operations are well aware that maintaining a 20-minute fuel reserve is a standard practice to comply with safety regulations.