The day was October 20, 1972.
Parliament passed the Equal Pay Act, a move met with jubilation by those lobbying for equality.
But 50 years on, those celebrations are largely muted.
Māori, Pasifika, women and those with disabilities continue to be underpaid.
Women's liberation movement in New Zealand leader Sue Kedgley, and Mind the Gap spokesperson Dellwyn Stuart spoke to Guyon Espiner.