The December 12th West Coast Port Shutdown.
For more information, see http://westcoastportshutdown.org/
Monday 12/12 Oakland Schedule (at bottom of poster as well):
5:30am: West Oakland BART, March to Port
3pm: Rally at 14th and Broadway (Oscar Grant Plaza)
4pm: March to Port from Oscar Grant Plaza
5pm: West Oakland BART, March to Port
From Noon to 3pm, there will be performances at Oscar Grant Plaza.
This will be the biggest move the Occupy Wall Street Movement has embarked on.