Yes, there is, and has been for quite a while:
https://www.rcaanc-cirnac.gc.ca/fra/1466616436543/1534874922512 That is a government site, but this day and month had been advocated well before that by Indigenous political, historical and cultural associations. It culminates in National Indigenous Peoples' Day, the 21st of June (Boreal Summer Solstice). I've worked on that for years here. Of course it pretty much disappeared this year.
I was also pleased to see Native Lives Matter posters nearby, in my neighbourhood.