Helen Clark was sworn in as Prime Minister of New Zealand, becoming the first woman to achieve this position through an electoral process and the second woman overall to hold the office. This significant event followed the Labour Party's success in the 1999 general election, where they formed a coalition government with the support of other parties, including the Progressive Coalition and the Alliance. The Labour Party, under Clark's leadership, gained victory in an election characterized by calls for change following years of a National Party government, which faced criticism over economic management and social issues.

The swearing-in ceremony took place at the Beehive in Wellington, where Clark committed to various social and economic reforms. Notably, her government focused on improving healthcare services, education, and environmental sustainability. This administration also emphasized the need for greater recognition and rights for indigenous Māori peoples, making Clark's government pivotal in advancing social equity in New Zealand.

In her inaugural address, Clark highlighted unity, collaboration, and progressive governance as cornerstones of her administration. Her term as Prime Minister was marked by a commitment to inclusive policies and international engagement, with a particular focus on aligning New Zealand's interests with broader global challenges, including climate change and trade relations. Under her stewardship, New Zealand established a strong reputation on the world stage, especially regarding environmental policies and social justice initiatives.