A brief pause before a shared meal, naming one thing from the day worth appreciating, gives a family or household a small, reliable ritual that requires no special preparation and fits naturally into something that was already going to happen anyway, several times each week without fail.
The mealtime setting helps the habit stick specifically because it recurs so reliably: unlike a standalone gratitude practice that depends on remembering to begin it, a mealtime ritual is carried along by an activity the household is doing regardless, which removes much of the friction that causes other habits to quietly lapse.
Over time, this small ritual tends to shape the general tone of a household's shared meals, gently steering conversation toward what went well even on a difficult day, which for many families becomes one of the more reliably valued moments of an otherwise ordinary week. It is a habit worth defending, even on the days it feels entirely unnecessary.