You probably all know this being a knowledgeable lot!

According to "Racing round the Island" (my copy of which is full of wonderful autographs which blow me away every time I open it) 23rd March 1904 saw the landing of the first racing machine on the IOM. Ok, so it was a car, but it was the "dawn", wasnt it! I raised a glass.
The next significant date is aparently 10th May .

Mike