Nikon sent invitations in the Netherlands for an event on September 22nd. The event will take place on a Friday which is an unusual day for Nikon to introduce new products, but somehow I think the new D850 DSLR camera will be ready to be displayed by then.
Update – there is another Nikon event in Germany on September 23rd:
Nikon will also hold two fan meetings in Tokyo (August 26th) and Osaka (September 2nd). It will be interesting to see if the D850 will be on display on those dates.