How do you say The year is 1984 in French?

The most common and natural way to say "The year is 1984" in French is:

Nous sommes en 1984.

This translates literally to "We are in 1984".

You can also use the more formal and literary:

L'année est 1984. (The year is 1984.)

Both are correct, but the first one is more common in everyday conversation.