Key points:
- Ms Ardern choked back tears saying she did not have the energy to seek re-election
- Her final day in office will be February 7
- She announced New Zealand's general election will be held on October 14
Ms Ardern choked back tears on Thursday as she said she did not have the energy to seek re-election.
She said her final day in office will be February 7.
"I know what this job takes. And I know that I no longer have enough in the tank to do it justice," she said.