These hackathons, like small pieces, will be loosely joined by 5 basic principles.
It will happen on Saturday, February 23rd.

From the Organizers... It can be as big or as small, as long or as short, as you'd like it.
It should be open

Ottawa's open data community attracts a diverse crowd of people to hackathons, with whole families coming out. In the UK groups have done amazing work getting young and diverse group hacking. Veteran hackers have said it over and over again: Our movement is stronger when it is broader.
Anyone can organize a local event

Want to help organize one in your city and/or participate? Add your name to the relevant city on the wiki. Let's try to keep it to one event per city, build some community and get new people together.
You can hack on anything that involves open data

Could be a local or global app, a visualization, proposing a standard for common data sets, scraping data from a government website to make it available for others or even creating your own data catalog of government data.

What to Expect

A lot will be going on. So... expect to:

    Learn more about open data.
    Find out how your local and national government could do more to release open data.
    Engage local non-profits and companies in the uses of open data for the products and missions
    Meet & network with tons of cool people in your city and around the world.
    Voice your opinion & share your ideas with the people and media attending.
    Find out about apps being created, and get to play around with them as well.
    Help out with parts of the conceptualization, creation, design, advertisement and testing of apps.
    Conduct an open tutorial sessions around using open data,like learning how to customize google maps to show the data you want to show.
    Have lots and lots of fun.


What to Bring

Anything! Bring your laptops, mobile phones, phasers set to stun, etc. but above all, your energy and your brains! We’re trying to make this event very hands on, so feel free to bring all your wacky geektronics so that you can participate in all the fun. Don't worry if you don’t bring anything since there will still be tons of stuff to do.

See some of the 2013 events or plan one and list it here!
http://wiki.opendataday.org/2013/City_Events

So far events are planned for:
    Albany, N.Y.
    Cary, N.C.
    New York City
    Washington, D.C.
    Minneapolis/St. Paul, MN
    Mountain View, CA - Open Science/Data P2PU Course Sprint
    Sacramento, CA
    Oakland, CA
    San Francisco, CA - EcoHackSF / Urban Data Challenge Hackathon
    Milwaukee, WI
    Honolulu, HI
    Vancouver
    Montreal
    Toronto
    Victoria
    Hamilton
    Calgary

Supporting Resources:

• http://wiki.opendataday.org/2013/App_Ideas
• Data Wiki - http://wiki.opendataday.org/2013/Data
• http://opendataday.org/ 
• DataBC Geographic Services group on LinkedIn