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Events on this Day – 4 August

1923

The opening of the 8.5-km Ōtira tunnel completed the long-planned transalpine railway between Christchurch and Greymouth. At the time, it was the longest tunnel outside the Alps and the seventh-longest in the world.

1965

First included within the boundaries of New Zealand in 1901, the islands were governed by a Resident Commissioner until 1946. When they achieved self-government, Cook Islanders remained New Zealand citizens.