Silver Surfers will get a free taste of the internet to help them Spring Online from 16-20 May.
More than 1,500 organisations will join forces for Silver Surfers Day in a bid to get more older people online.
The Spring Online campaign will hold taster sessions in venues across the country, from cafes and universities to libraries and pubs, to help older people familiarise themselves with computers and the internet.
Emma Solomon, managing director of Digital Unite which specialises in helping older people go online, said: "Through our work over the last 15 years, we have found that the main barriers for older people in using digital technology are lack of confidence and understanding."
Although computers and the internet are an essential part of life for many people, "a fifth of those aged 55-64 have never been online", said the organisers. "This rises to three in five among those aged 65 and over."
Martha Lane Fox, UK Digital Champion, added: "If everyone in the UK took the time to show an offline family, friend or neighbour the benefits of being online, we'd be very close to enabling millions more people to enjoy life online.
"You are never too old to get started with the web and Spring Online with Silver Surfers Day is a great chance for new users to find out more about how the internet can make their lives easier, cheaper and much more fun."