New Zealand Environment Minister David Benson-Pope resigns from the Cabinet.
- New Zealand MP and senior Cabinet Minister Chris Carter quits politics, stating that his travel expenses received unfair attention due to his sexuality.
- Seven regions in New Zealand declare states of emergency as Cyclone Gita makes landfall.
- In a "Scientific Reports" publication, researchers propose 1965 as the start of the Anthropocene era. In that year, human nuclear weapons testing caused a noticeable spike in radiocarbon in the heartwood of the world's remotest tree, a Sitka spruce on Campbell Island, New Zealand. The general scientific community has already been using 1950 as the year "Before Present", when nuclear weapons began to significantly affect the reliability of radiocarbon dating of objects whose organic matter content formed after that epoch.
- Seven survivors from the MV "Butiraoi", six adults and a baby, are found in a dinghy and rescued, four days after the 50-passenger ferry sank in Kiribati. New Zealand rescuers say there is a lot of debris near the dinghy, but no sign of anyone else.
- Rocket Lab successfully launches test rocket Electron into orbit from Mahia Peninsula, New Zealand, becoming the first rocket to reach orbit using an electric-pump-fed engine, after the original rocket launch in May 2017 had to be aborted by safety officials.