Well... It depends on what you need it for.
There is for example fireworks in The Legend of Zelda: Majora's Mask (there is the Virtual Console version or The Legend of Zelda: Collector's Edition for the GameCube). If you stand in South Clock Town on the 3rd night at 12 PM a scene will play that will open the Clock Tower, which is accompanied with fireworks, since carnaval has started.
To trigger the fireworks in New Super Mario Bros. Wii you need to reach the flagpole of a stage with the last two digits of the timer being the same (except for 00). How many fireworks you get depends on your remaining time with the formula of: timer % (modulus) 10.
There is for example fireworks in The Legend of Zelda: Majora's Mask (there is the Virtual Console version or The Legend of Zelda: Collector's Edition for the GameCube). If you stand in South Clock Town on the 3rd night at 12 PM a scene will play that will open the Clock Tower, which is accompanied with fireworks, since carnaval has started.
To trigger the fireworks in New Super Mario Bros. Wii you need to reach the flagpole of a stage with the last two digits of the timer being the same (except for 00). How many fireworks you get depends on your remaining time with the formula of: timer % (modulus) 10.