7 May: The government's foreshore and seabed Bill passes its first vote in Parliament.
11 May: The Criminal Records (Clean Slate) Act is passed. The Act allows people who have not reoffended for seven years to not declare minor criminal convictions in most circumstances.
June
16 June: A meteorite crashes into an Auckland house, becoming the ninth recovered meteorite in New Zealand.[4]
30 June: Statistics New Zealand estimates for this date put the Cities of Lower Hutt and Tauranga at over 100,000 residents for the first time and Waimakariri District at over 40,000
9 October: 2004 local body and health board elections completed, but not all of the counting; and some results need to wait for special votes. All three West Coast mayors unseated, along with several in more populous centres such as Auckland.
1 November: A reciprocal working holiday agreement between New Zealand and Belgium comes into effect.[5]
18 November: Legislation passed vesting ownership of all land up to the high tide mark in New Zealand with the Crown.
23 November: A magnitude 7.0 earthquake strikes south-west of the South Island.[6]
29 November: The Criminal Records (Clean Slate) Act comes into force.
December
9 December: The Supreme Court of New Zealand granted Ahmed Zaoui bail. He will reside in the Dominican Friary in Auckland. He will have to report to the police twice a week and must spend each night in the friary.
9 December: The Civil Unions Act is passed. The Act establishes the new institution of civil union, available to same-sex and de facto couples.
10 December: Smoking is banned in workplaces or licensed premises.
New categories introduced were 'Best Rock Album', 'People's Choice Award' and 'Airplay Record of the Year'. 'New Zealand Radio Programmer of the Year' was retired.[8]
Dale Warrender wins his first national title in the men's marathon, clocking 2:23:40 on 1 May in Rotorua, while Nyla Carroll claims her second in the women's championship (2:46:44).
In December Australia and New Zealand played a series of 3 one-day matches in Australia for the inaugural Chappell–Hadlee Trophy. After winning one game each, the decider was washed out by rain, so the trophy was shared.