Etiquette
You may be greeted with a casual "gidday!" or "Kia ora!" (Hi) or "Kia ora, bro!" since New Zealanders are refreshingly laid-back, unassuming, and devoid of pretense (Hi, mate). Unless you're on business or have a diplomatic event to attend, you can leave your suit and tie at home; even the best restaurants just demand decent dress. Dress codes are as informal as the pleasantries.
Although the legal drinking age in New Zealand is 18, you may be requested to present identification to prove your age. This identification must be either a New Zealand driver's license or a passport; international driver's licenses are not recognized.
More and more countries are banning smoking. According to smokefreecouncils.com, it is prohibited on all public transportation, in all public buildings, and in some outdoor spaces. It is pleasantly simple to tip in New Zealand. Although it is not customary to tip, outstanding service in restaurants and coffee shops is appreciated.