"Afternoon picnic" refers to a get-together or a small meal that takes place outdoors, usually in a park or a garden, during the afternoon. Full definition
If a more relaxed approach is more your style then perhaps a quite afternoon picnic by the river is just what you are after. (maroochydoreinfo.com)
Although this isn't the best fare if you are traveling far, it's perfect for afternoon picnics in the backyard or on the porch. (mindbodygreen.com)
Experience the ultimate picnic in The Park and enjoy a fun interactive afternoon picnicking with celebrated chefs, live music and a festive atmosphere. (theparkvegas.com)