Ōrongonui
1. (personal noun) moon on the twenty-seventh night (sometimes the twenty-eighth night) of the lunar month - for some tribes (e.g. Te Whānau-ā-Apanui) this is the thirteenth night of the lunar month.
He pai a Orongonui mō te hao īnanga (Te Ara 2016). / Ōrongonui is good for netting whitebait.
2. (noun) thirteenth night after the full moon.
Pērā anō te āhua o te Ōrongonui nei i ērā rā e rima kua pahure ake. He pō tino pai mō ngā mea katoa (WT 2013:37). / Ōrongonui is just the same as those past five days. It's a very good day for everything.