"The eight o'clock newscast has a new presenter."

Translation: Le journal de vingt heures a une nouvelle présentatrice.

[LauraLetou]

"Vingt" should be "huit"

[sue843185]

They should have been more specific.

In French use the 24 hour clock.
8:00pm is 20:00h, 8:00am is 8:00h (h = heures)