The deadline for the Lester B. Pearson International Scholarship at the University of Toronto varies depending on the year and the applicant's school. Typically, students must submit their applications for admission to the university by the November deadline for their chosen program. The scholarship application itself is usually due in late January or early February. However, it's crucial to check the official Lester B. Pearson International Scholarship website for the most up-to-date information on application deadlines and requirements.