The Port Chalmers time ball is a Victorian maritime Greenwich Mean Time signal located on Aurora Terrace on top of Observation Point in the port of Port Chalmers, New Zealand. It was established in 1867 by the Otago Provincial Council. The time ball fell precisely at 1 p.m. daily. Originally triggered by a grandfather clock, from 1882 onwards a telegraph signal from Wellington took over this function. It was removed in 1970, but a replacement was restored to service in 2020.