Fireworks. We use fireworks to celebrate the day usually. I describe the culture diversity with many colours of people. Peoples as fireworks. They fly and reach the sky together, and looks beautiful when they are getting there which means succeed. And a couples stand above ground describe gender equality.
I add a globe circled by colourful band. I describe it for diversity of culture on earth. And once again ended by fireworks of people.
#3 & #4
In black and white.