When did Claude Debussy have a picnic with daughter in 1916?

Claude Debussy had a memorable picnic with his daughter, Claude-Emma (nicknamed Chouchou), in 1916 during World War I. This outing took place in the countryside near their home in East Sussex, England, where they enjoyed a day of leisure amidst the turmoil of the war. The picnic is often highlighted as a poignant moment in Debussy's life, reflecting his deep affection for his daughter.