It is one of the two Summer contracts, along with Waterballoon Fight! which began on the 20th of June, 2018 and is valid for 14 days.
The contract was started after scientists invented the Firework Egg and are using it to meet rising demands for 4th of July fireworks
The contract can only be tackled by the player with 7 days to do so.
"With 4th of July nearing in the States, scientists have found a new way to meet the demand for fireworks..."