Following is a short history of Pink Shirt Day as found on the Pink Shirt Day Canada website:

In 2007, Berwick Nova Scotia, after a new student at their school was bullied for wearing a pink shirt, two grade 12 students bought 50 pink shirts and encouraged their classmates to wear pink. The next day they went to distribute the shirts and to their surprised the majority of students arrived wearing pink! With that act of kindness, Pink Shirt Day was born. (Pink Shirt Day Canada)