Unofficial observances in New Zealand

Apart from the official Holidays in New Zealand and Public holidays in New Zealand, usually celebrated by a paid day off work, there are a number of 'unofficial observances in New Zealand that are celebrated for days, weeks or months.
Days

Chinese New Years in January/February (varies)
Valentine's Day 14 February
Children's Day first Sunday in March
World Book Day 4 March
International Women's Day 8 March
Walk To Work Day 10 March
St Patricks Day 17 March
Race Relations Day 22 March
April Fool's Day 1 April
J Day 3 May
Mother's Day second Sunday in May
World No Tobacco Day 31 May
Matariki in May or June (varies)
World Refugee Day 20 June
International Day of Indigenous People 9 August
World Youth Day 12 August
Cancer Society Daffodil Day last Friday of August
Random Acts of Kindness Day 1 September
...