The Charities Aid Foundation will organise the UK's first Giving Tuesday on 2 December.
The event was started in the US two years ago by the New York-based community organisation 92nd Street Y to encourage the public and businesses to do something charitable on the Tuesday after Thanksgiving, the national holiday celebrated in the US.
According to the Giving Tuesday website, Blackbaud, the fundraising software provider, processed more than £5.9m in online donations in the US in 2012 for the first Giving Tuesday, a 53 per cent increase compared with the Tuesday after Thanksgiving the previous year.
In addition to the US, the initiative runs in Australia, Canada, Israel, Mexico and Singapore. There is also a Latin American version of the event.
John Low, chief executive of CAF, said the event was an "antidote to consumerism" in the run-up to Christmas.
"It has rolled out in the US and has gone to other countries such as Canada and Singapore where it has been really successful," he said. "It doesn’t compete with anyone else and it’s trying to be a catalyst for giving generally."
Nick Hurd, the Minister for Civil Society, said in a statement: "We have always been a nation of givers and this is an opportunity for us to demonstrate our generosity on a global scale."
CAF is planning to set up a website later this year for organisations that want to get involved.