Not so unique but it is beautiful and quite easy to achieve.
Use a dark background (black, dark blue, matte, glossy, sand, glitter)
Use bright colors to paint the fireworks.
The fireworks look can be achieved with dots and lines placed in a circle, umbrella shape, opening flower shape or like rain.
It doesn't really matter what you do. This time a year using a dark background+bright colors makes everyone think about fireworks immediately. So, just have fun with it!
Here are some swatches of my background color.
Rimmel London Space dust 005 Total Eclipse
"
Total Eclipse" is a black based polish with teal glitters that light up in artificial light (pictures above).
It dries quick and like a textured polish. Two coats is enough for good coverage.
In natural light the polish looks like this:
To make the bright colors of fireworks pop extra I've used a white polish first.
Here is my nail art without and with topcoat. In the picture without looks better I think but in real life the topcoat made the colors more bright and therefore prettier.