It's Park(ing) Day today!
National Park(ing) Day is an opportunity to celebrate parks in cities and promote the need for more parks by creating temporary public parks in public parking spaces.
More than 70% of most cities’ outdoor space is dedicated to the private vehicle while only a fraction of that land is allocated to open space for people.
Started in 2005 by the art collective REBAR in San Francisco, they have made available a light hearted How To Manual which states that
The manual covers it all - from reminders to bring change to feed the meter to advice for dealing with the authorities and curious by standers.
The Trust for Public Land has lots of info, too.
Locally, The Project for Public Spaces, an organization with global reach is dedicated to sustainable public spaces and the importance of these spaces in building communities, is participating in Park(ing) Day. Their Park(ing) spot will be on Great Jones and Broadway outside their offices. More info and map here.
For other NYC spots and info check here.