The largest meal of the day should coincide with the peak of digestive fire, which Ayurveda places at midday, roughly 12 to 2 PM. Modern research on circadian rhythms in metabolism supports this. Eating a light dinner and avoiding food close to sleep are central to both Ayurvedic and chrononutrition recommendations.
Consistent meal timing, even without changing what you eat, measurably improves several metabolic parameters within weeks. Skipping meals and eating erratically are considered damaging to digestive fire in Ayurveda, and modern metabolic research agrees.