Monday 3 Jan New Year Day
Tuesday 4 Jan New Year Day
Thursday, 21 Apr Abbreviated trading
Friday 22 Apr Good Friday
Monday 25 Apr Easter
Monday 25 Apr ANZAC Day
Monday 6 Jun Queen Birthday
Monday 24 Oct Labour Day
Friday 23 Dec Aggreviated Trading
Monday 26 Dec Christmas Day
Tuesday 27 Dec Boxing Day
Friday 30 Dec Abbreviated trading
Source: https://www.nzx.com/markets/NZSX/trading_hours