It's a day to unite and stand up against bullying.
Pink Shirt Day was inspired by two grade 12 Nova Scotian students in 2007.
They decided to take action after witnessing a grade 9 student being bullied for wearing a pink shirt to school.
The students bought 50 pink t-shirts and encouraged schoolmates to wear them and send a powerful message of solidarity to the bully.
Since then, the idea for Pink Shirt Day has become a nation wide effort spearheaded by the Boys and Girls Club of Vancouver.
Local organizations in Hamilton have jumped on board to raise awareness including Living Rock, the Boys and Girls Club, Catholic Youth Organization, YWCA and the Eva Rothwell Centre.