What is the climax of the moustache?

In "The Moustache" by Robert Cormier, the climax occurs when the protagonist, Mike, visits his grandmother in the nursing home and confronts the emotional weight of his decision to grow a moustache. During this visit, he realizes that his grandmother, who has trouble recognizing him, reacts to his new look in a way that forces Mike to grApple with his identity and the impact of his choices. This moment highlights the tension between his adolescent desire for independence and the responsibilities he holds towards his family, ultimately leading to a poignant revelation about self-acceptance and the passage of time.