I can't create a character with my own name

I had a character with a name on the Onyxia server, I deleted it, and now I can't create it
nick Wolgen 20lvl

Wolgen is considered "already in use" until the restoration period of the character ends.

how long is the restoration period?

A character stays available for Restoration for 30 days.

Is it possible to restore a 20lvl character on the Onyxia server now?