Why all this nonsense about this wedding? I doubt they're the only ones getting married that day. Why do we still even have a monarchy, for that matter?
I guess you're not taking Victoria Day off either
While I agree, there's probably a few thousand people getting married same day, it's just part of the history, same reason Toronto cops have red stripes on their pants, the Ontario flag looks the way it does, etc.
It's not so much William that is getting the attention as it is Meghan Markle. She is well known in the US and Canada due to here role in Suits and taking up residence in Toronto where the series is filmed. Then there is the resemblance to the Cinderella fairly tale, a common theme in western culture.
The interest surrounding this wedding reminds me of the marriage between what-his-name(1) and Dianna Spencer who became the Princess of Wales. Markle's North American connections makes this one even more popular here.