Tuesday 01 Jan New Year's Day
Wednesday 02 Jan New Year's Day
Wednesday 06 Feb Waitangi Day
Friday 29 Mar Good Friday
Monday 01 Apr Easter Monday
Thursday 25 Apr ANZAC Day
Monday 03 Jun Queen's Birthday
Monday 28 Oct Labour Day
Tuesday 24 Dec Abbreviated Trading
Wednesday 25 Dec Christmas Day
Thursday 26 Dec Boxing Day
Tuesday 31 Dec Abbreviated Trading
Source: https://www.nzx.com/markets/NZSX/trading_hours