If you're visiting New Zealand from the UK or Europe, one of the biggest things to deal with is the time difference. There's no easy way to get round it, times in New Zealand are pretty much the exact opposite to the UK and Europe. Breakfast time in Auckland is dinner time in London, mid afternoon in Nelson is the middle of the night in Amsterdam. It's all upside down! Here's a handy summary of time differences between New Zealand and the United Kingdom / Europe, including the best time to phone and a few handy hints on how to handle that time difference once you're here.
We're MoaTrek, and we've been running our small group tours here in New Zealand since the 1970s, and have shown all our favourite holiday spots to lots of people from Europe and the UK. We're very used to helping people sort out their trips, even if there is a 12 hour time difference and can help you sort it out too.