I agree, we are all of this land.

I partially agree with looking forward rather than back with the addition that it's best to look forward while being informed by the past at the same time. The first step is always learning and there's always so much to learn. Like looking up Mabo just now I learned a great deal about the person Eddie Mabo that I didn't know before.

changing the date isn't going to magically solve anything.

No it's not, you are right! But I think it would still be a good thing to do. What does need solving though? I'd like to hear your view.