It is being hailed as one of the quietest Territory Days in years, despite reports of dozens of blazes, property damage and minor injuries as the Top End lights up.

Police and firefighters were called to dozens of blazes across Darwin last night as people took advantage of living in the only jurisdiction in Australia where fireworks can be sold for personal use.

Eight people were admitted to Territory hospitals with firework related injuries.

Five people were treated at Royal Darwin Hospital, one in Katherine and two in Alice Springs.

Among the injured were three children under the age of 12.

Health officials say all eight people were treated for minor burns and cuts, and were later discharged.

Two cars and a garage were burned at a house at Durack in Palmerston.

A wayward cracker also burned a shade-cloth canopy and outdoor furniture at house at nearby Woodroffe.

In all, firefighters said there were at least 400 fires reported across the Northern Territory.

Police Watch Commander Geoff Bahnert says 15 abandoned cars were destroyed and gas bottles exploded in a grass fire caused by fireworks near the Southport boat ramp in Darwin's rural area.

"The rural fire services went out and were able to cut a fire break to save a house that was on the block," he said.

Fireworks can be sold for private use only on Territory Day.

Traditionally, Territorians spend several million dollars on fireworks each year.

They face fines for using them at times other than on Territory Day.

Event organisers reported good crowd numbers at organised fireworks displays across the Territory.

Thousands flocked to the biggest near Mindil Beach in Darwin Harbour.

Firefighters at Alice Springs say it was also quiet, with only 14 emergency calls being answered, compared to 30 last year.