If polling stations are numerous and accessible enough, an entire day isn't necessary. https://www.ontario.ca/laws/statute/90e06#BK18 https://www.ontario.ca/la

If polling stations are numerous and accessible enough, an entire day isn't necessary. https://www.ontario.ca/laws/statute/90e06#BK18 https://www.ontario.ca/laws/statute/90e06#BK18 edit: Canada also has advance voting. Polling stations open 5 days before the election day and people can voting during business hours on those days.