The Internet Movie Database has the Bulgarian '
Order of the Phoenix' release date listed as July 27th 2007; two weeks after the UK, US & Canada release.
As with the Australian release [rumoured for September 6th 2007],
we're still trying to attain confirmation for both from WB. When we hear anything about international release dates, we'll let you know.
UPDATE: WB have confirmed that this date is
incorrect. '
Order of the Phoenix' will be released in Bulgaria on July
20th 2007. That makes it just 1 week after the UK/US/Canada release.
Additionally, the German release date, of July 12th 2007, has also been confirmed.
Bulgarian 'Order of the Phoenix' release date confirmed 
