According to the official Movie site, the release date for the movie this year has been moved forward one day to the 24th June, in line with America and most of the rest of the world.

On the release listing
http://www.transformersmovie.com/intl/releasedates/
50 of the 57 countries with a release date, have a 24th June date, and the rest are within a few days of that.

A very coordinated global launch for a movie. Paramount really must be expecting it to be the big movie of the year then.

While you're there, check out the Australian section (which probably has the same content as other country pages).
http://www.transformersmovie.com/intl/au/

There's already some nice clips in there, with one showing the Autobot Pack racing through the streets, which looks like a GM publicity clip.