Citizen Science Day is and the City Nature Challenge is . Hundreds of events will be held around the world and you can find them here.
Citizen Science Day is presented by SciStarter and the Citizen Science Association.
Video courtesy of The Crowd & The Cloud
SciStarter is challenging you to a special mission to join and participate (at least once) in select SciStarter Affiliate projects. Complete your mission and you'll earn a SciStarter certificate. Keep on participating and you'll be eligible to become one of the top three mission contributors to win some swag and be connected with of one the scientists you helped!