RNID, WRVS and the Association for International Cancer Research will benefit from the campaign, which will involve encouraging people to fundraise on and in the run-up to St George's Day. All three charities will have the option to remain partners for three years.
"This will be a first, and it's great that the organisers have understood the added value that involving the voluntary sector can bring to such an event," said Derek Napier, chief executive of the Association for International Cancer Research.
A free 34-page guide to taking part will be distributed later this month.
It will include fundraising ideas and competitions. An interactive version will be available online from 16 January at www.celebratest-georgesday.com.
Bruno Peek, the event organiser, who was also responsible for the Trafalgar Weekend, Golden Jubilee and millennium celebrations, said that the event was aimed at everyone living in England and would encourage inclusiveness.