Thousands of street parties, picnics and baking competitions will be held on 17 and 18 June to remember MP Jo Cox, a year after she was murdered.
Her widower Brendan said the UK-wide event, called The Great Get Together, would be a "fitting tribute" to the mother-of-two who died on 16 June 2016.
Her murder was "designed to divide our country" so uniting in this way would be "a powerful statement", he added.
By asking people to come together for street parties, picnics and bake-offs, it is hoped to create the biggest street party since the Jubilee, and send a message to everyone. That there is more that unites than divides us.
For further information and to get involved, visit: https://greatgettogether.org/