While Apple has not revealed this, it is expected to mark the launch of the new iPhone, which will be the sixth generation iPhone in its series and possibly named the Apple iPhone 5.
[UPDATE] Watch the Apple iPhone 5 keynote video
We will be live covering the event as it happens. Be sure to bookmark this page in time for the launch:
Start time 10AM PT | 12PM CT | 1PM ET | 6PM GMT | 7PM Central European Time.
The event also marks the release of iOS 6.0, the possible unveiling of a new iPod Lineup including an iPod Touch with a dual core processor and the rumored iPad Mini with a smaller display and price tag.