Yesterday, however, I learn that an event of extreme importance has occurred.

He had something of extreme importance to do or say or tell someone.

"What I have to say is of extreme importance."

Greetings are considered to be of extreme importance in Japanese culture.

For many Serbs it is considered to be of extreme national importance.

She gives extreme importance to family over her modelling career.

"For now I have something of extreme importance to attend to."

I wouldn't ask this if it wasn't a matter of extreme importance.

First, Parliament's role in the discharge has been shown to be one of extreme importance.

To finish, I want to say that this is a matter of extreme importance.