Editing Ruatapu (section)

===Ngāti Porou tradition===
In a tradition of Ngāti Porou, Ruatapu became angry when his father Uenuku elevated his younger half-brother Kahutiaterangi ahead of him in status. Ruatapu lured Kahutiaterangi and a large number of young men of high birth into his canoe, and took them out to sea where he drowned them.  He called on the gods to destroy his enemies and threatened to return as the great waves of early summer,<ref name="Reedy1997">{{cite book|author=Reedy, Anaru|date=1997|title=Ngā Kōrero a Pita Kāpiti: The Teachings of Pita Kāpiti|location=Christchurch|publisher=Canterbury University Press|pages=83–85)}}</ref> shouting out to Kahutiaterangi that he would return to fight him: "The great waves of the eighth month, they are me! I am then approaching!" In an endnote, Reedy writes:

<blockquote>
    In the eighth month of the Māori calendar, in the early summer, large waves known as ''ngā tai o Rangawhenua'', Rangawhenua's waves, sometimes break upon the shore on the East Coast. In this episode Ruatapu announces that in the eighth month he will take this form, and follow Paikea.<ref name="Reedy1993"/>
</blockquote>

Such accounts or conclusions may result from [[Christianity|Christian]] influence, inspired by the [[Genesis flood narrative]]. The eighth month of the Māori calendar is Kohitātea (December–January) according to [[Ngāi Tūhoe]].<ref name=teara-lunarmonths>{{cite web|url=https://teara.govt.nz/en/maramataka-the-lunar-calendar/page-1|title=Lunar Months|publisher=Te Ara - the Encyclopedia of New Zealand|access-date=20 April 2020}}</ref>