Orange Shirt Day (September 30th) is a day when we honour the Indigenous children who were sent away to residential schools in Canada and learn more about the history of those schools. All are encouraged to wear orange to bring awareness of this topic in history and to reduce racism and bullying towards indigenous people.

https://www.cbc.ca/kidscbc2/the-feed/what-is-orange-shirt-day#:~:text=Or...(September%2030th,the%20history%20of%20those%20schools.