Throughout this period of insurrection, from Iceland to the latest upheavals in Russia and Hungary, if anything has become clear is the advanced state of decay of political systems and their mechanisms of representation (they do not represent us!), And their subservience to capitalist command (rescue the people not the banks!)
In 2011 we took the streets, we found our voice in public spaces to meet and share our dreams. We came together to make it clear that we are not goods in the hands of politicians and bankers, austerity measures further job insecurity into our lives and we must claim as fellow Greeks: “we do not owe, we do not pay, we do not sell!”
But what is even more important, we also share the desire to re-appropriate our common life and property through direct participation and joint management, and ultimately the desire for true democracy in the service of the common good.
Following discussions in international forums, on-line and face to face, it was agreed to put forward the 12th May as a day of demonstrations (actions), and 15M, transnational day (of new forms of) mobilization.
On Saturday 12M is proposed as a global day of action in which we again take to the streets, either to take the squares, or to develop specific actions in the territories that gathered mass demonstrations.
In contrast, the 15M is constructed as a global day of action, intervening on capital flows and mobility, while launching coordinated actions that will lead the world to start walking in a new direction. It’s about building a new imagination to define human relations, economic, social, to provide us with a transformation of power relations between governments, capitalist rule and societies.
To facilitate these actions it is proposed to convene a meeting (English / Spanish) in Mumble on Saturday January 28th.
Mumble [VoIP software] : http://takethesquare.net/2011/10/04/mumble-setup-walkthrough/
Room: # 12M # 15M 
Saturday January 28:
11:00 (UTC-8) West Coast of USA
12:00 (UTC-7 MST, Arizona …)
13:00 (UTC-6 Chicago, Texas)
14:00 (UTC-5 New York / DC)
16:00 (UTC-6 East Coast of Brazil)
19:00 (UTC +0 Canaries and UK)
20:00 (UTC +1 Europe)
23:00 (UTC +3 Western Africa)
[CC] Copied and translated from http://madrilonia.org/2012/01/asamblea-preparatoria-de-la-convocatoria-global-del-12m-y-15m-de-2012/