What is the timeline to Walk Two Moons?

"Walking Two Moons" by Sharon Creech takes place over the course of several months, as thirteen-year-old Salamanca travels with her grandparents from Ohio to Idaho. The novel is structured around Salamanca telling her own story during the road trip, while also learning about the life of her friend Phoebe. The timeline is fluid, interspersed with memories, reflections, and present-day events.