From the website.

The White Ribbon campaign in New Zealand is a meld of the White Ribbon Day movement in Canada and the United Nations International Day for Elimination of Violence Against Women, which is celebrated on 25 November each year.

The campaign has activities throughout the calendar year with an increased focus in November. White Ribbon is driven by a campaign team and community groups in towns and cities throughout New Zealand, while events and activities are increasingly supported by businesses, cultural groups, sporting teams, local government and a wide range of community and government agencies.