Events in the Origami World...
Several wonderful origami websites
try to keep track and publish a list
of events worldwide.... I shall list those here for you to see:

The British Origami Society and Origami USA are most helpful for most origami related questions and searches.

And finally, for those locally I list the link to my own Events page at the website.
Origami  USA  Events listings
Pacific Coast Origami Convention
British Origami Society Listing of International Events
Origami Deutschland  Listings of Events
Click "Events"
Peace Tree Festivals
Origami Designs  Local So California:  Events