Luncheons

Lunches
Meals
Midday meals

2013037133: Elias, M.J. Lunch : a history, 2014.
2014955542: Craig, C. The little book of lunch : 100 recipes & ideas to reclaim the lunch hour, 2015.
2017953565: Younkin, M. The weekday lunches & breakfasts cookbook, 2018.
2009053192: Tuminelly, N. Super simple lunches : easy no-bake recipes for kids, ©2011.
2003016448: Zurakowski, M. Midday meals around the world, ©2004.
Creber, A. Luncheons, 1986.
Brobeck, F. How to give luncheons, teas, and showers, ©1964.
Merriam-Webster dictionary online, Apr. 30, 2020: lunch (1 : a usually light meal especially : one taken in the middle of the day 2 : the food prepared for a lunch) luncheon (lunch; especially : a formal usually midday meal as part of a meeting or for entertaining a guest)
Lexico.com, Apr. 30, 2020: lunch (A meal eaten in the middle of the day, typically one that is lighter or less formal than an evening meal) luncheon (A formal lunch, or a formal word for lunch)