As of today, New Zealand women are effectively working for free until the end of the year because of the 8.2% gender pay gap.
Based on that gap, the average Kiwi woman is paid 336 days for the equivalent of 366 days for men, according to the Ministry for Women.
The issue is deeper too. As mentioned in another comment, [women are often found in jobs that have low pay to start with (https://www.women.govt.nz/women-and-work/occupational-segregation), regardless of sex. One has to find out why that happens as well as why those jobs are paid so badly. “Because women” is not an explanation as the “solution” could either be “fire all women” or “hire more men”, but that’s barely an attempt at analysing nor solving the issue.