Otc Spring 2025 Calendar. Registration for summer 2025, fall 2025 and spring 2026 classes starting today at 12:01 am *act® announced changes to the online test format for spring 2025 for national test dates, for paper tests in september 2025, and for school day testing in spring 2026.

First day to register for spring 2025 classes: *act® announced changes to the online test format for spring 2025 for national test dates, for paper tests in september 2025, and for school day testing in spring 2026.