The registration period for Day 1C has officially closed.
If you want to play in a $200 + $20 Grand Prix Canada Day 1 event today, you now only have two choices: either play in the 5PM Day 1D flight, or come down at 10PM for the Day 1E Turbo flight, where levels last on 15 minutes, as opposed to the normal 30 minute levels of non-turbo flights.
Good luck!