Regulations brought in four years ago restrict the sale of fireworks to just four days before 5 November.
The legal age for buying fireworks was increased to 18 and their noise level was capped at 90 decibels.
However, the Society for the Prevention of Cruelty to Animals has repeated its call for a complete ban on selling fireworks to the public.
SPCA president Bob Kerridge says because Guy Fawkes is not a significant event for New Zealand, people stockpile the fireworks and let them off any time from November to the New Year.
Mr Kerridge says he hopes people behave responsibly with fireworks and think about the potential damage to people and animals.
He says the SPCA is not opposed to displays put on by local groups or authorities.
Injuries from fireworks have almost halved since the new legislation was introduced.