What does one do at that day over there ?

Some fireworks, and some concerts during the day. Mainly free events to celebrate and learn about Canada.
Today we went to some museums for free, petting zoo, and a tonight there will be concerts and fireworks in the park. It is a fun time and I enjoy it.
Overall it's like a family holiday

That sounds pretty nice ~

It can be a great day if you allow it to be, there are always ney sayers but overall a good time