During the campfire scene, when the girls are singing to the boys, Linus and Schroeder switch shirts so Linus has the purple one and Schroeder has the red one.
Lucy signs everybody up for camp. However, she is 8 or 9 years old so she can't legally do so, especially without the permission of the parents.
Charlie Brown's opening lines of his essay were, "I played ball and went to camp." He then counted eight words, but only seven were written.
Sally Brown is nervous on her first day of Kindergarten. However, two years before ("You're In Love, Charlie Brown"), she is seen practicing her graduation from Kindergarten.
The animated Peanuts are not chronological in any sense of the word. The characters also never age.
The animated Peanuts are not chronological in any sense of the word. The characters also never age.