Answer: June 18
Notes: Sustainable Gastronomy Day is observed every year on June 18 to promote eco-friendly food practices. It aims to raise awareness about sustainable gastronomy's role in food security, nutrition, biodiversity conservation, and sustainable development. The day highlights responsible food habits from harvesting to preparation and consumption. Sustainable gastronomy supports agricultural development and sustainable food production. The first official observance was held on June 18, 2017.
