Hipkins making it up

Hipkins also ignores that Clark called a snap election in 2002, meaning the 2002 and 2005 election could not be held in November (or October). So if you exclude those you have November for 1999, 2008 and 2011 and October only in 2020 and 2023. Any time between September and November is not unusual for an election date.

Also worth noting every non snap election from 1946 to 1981 was also in November.