Passengers will “fly back in time” this evening when their flight departs from Hong Kong in 2025 and lands back in Los Angeles in 2024.

Few can toast the New Year twice by crossing the International Date Line (IDL) on their flight.

The IDL is an imaginary line across the Pacific Ocean that marks two consecutive calendar days.

In other words, anyone traveling east through lDL will lose a day, while those traveling west will gain a day.

So these passengers will depart Hong Kong on New Year’s morning and arrive in LA on New Year’s Day.

The IDL has no legal international status but is widely understood as a division between the Eastern and Western hemispheres.

There will be another festive evening when those on the Cathay Pacific flight from Hong Kong arrive in the US around 8pm.

The National US Ocean Service said: “When you cross the date line, you become a time traveller of sorts!

“Cross to the west and it’s one day later; cross back and you’ve ‘gone back in time’.”

So for anyone looking to keep the party going this year – perhaps a time travel flight is just the ticket.

This comes as New Year’s Eve celebrations are kicking off – or have already finished – across the globe.

In London, New Year’s fireworks will go off as planned at midnight despite serious weather concerns.

A spokesman for the Mayor of London said that the festival will continue with revelers already preparing to move on to 2025.