Passengers on Hawaiian Airlines flight HA446 got to welcome 2018 in New Zealand, before jetting back to 2017 in Honolulu where they could do it all again.
— Flightradar24 (@flightradar24) December 31, 2017
How? That’s because the flight crossed the International Date Line on its journey from Auckland to Hawaii.
Honolulu is a full 23 hours behind Auckland, so as the plane took off at just after midnight on January 1 on New Zealand’s north island, it was still 1am on December 31 in the destination city.