There were reports from October 2016 that October would be made Islamic Heritage Month for Ontario, but looking at Ontario’s celebrations and commemorations there's no mention of it. I haven't found any reports of the idea being dumped - I'd expect some complaining and/or gloating if that did happen. So what's happened? Have they just forgotten to update their website?
A bill was proposed in the Ontario legislature to proclaim the month of October as Islamic heritage month. This bill has received royal assent and is now a law.
Additionally, the bill mentions that
In 2007 the Government of Canada declared the month of October in each year as Canadian Islamic History Month.
So October has been Islamic History Month in the entire nation of Canada for a decade and it is also now Islamic Heritage Month in Ontario.