Although many renewal and cancellation announcements for broadcast TV primetime shows for the 2011-12 season will happen prior to these dates, the broadcast network upfront events are the final date on which each network's fall schedules might be revealed.
So, you'll know no later than these dates about the fate of your favorite broadcast primetime shows. (although for the craziest of fans, the announcements on the dates below really don't really mean anything…)
2011 Broadcast Network Upfront Meetings
|May 16, 2011||NBC||New York||Morning|
|May 16, 2011||FOX||New York||Afternoon|
|May 17, 2011||ABC||New York||Afternoon|
|May 18, 2011||CBS||New York||Afternoon|
|May 19, 2011||The CW||New York||Morning|
|May 19, 2011||Univision||New York||Afternoon|
Cable networks also have advertising upfront events spread throughout March, April and May, but they aren't typically "the day renewals and cancellations are revealed" as are the broadcast events.