Nri status immediately after completing 182 days or fy wise ?

I will be completing 182 days ( counting from 1st April , 2024 ) outside India on 30th Sept , 2024 .Please let me know if I will be NRI on 1st October, 2024 or 1st April , 2025 . I need this information as I need to change status of my saving bank account / Demat / Trading accordingly. How much time I will get to change status of these accounts ?