The inaugural event will take place in more than 500 EE stores across the UK, between 9.30am and 11am, in a bid to help the general public improve their basic digital skills.
People who sign up to attend an EE National Techy Tea Party will be invited to bring along an electronic device, such as a smartphone, laptop or tablet, that they want to learn more about. EE staff will then help them get to grips with technology as well as teaching them basic online skills.
Tea brand Tetley, Asda and Samsung have also partnered with EE to show their support for the nationwide event.
Since the brand launched in 2012, EE has been organising local events of a similar nature across its offices, call centres and community venues.
Lucy Hastings, lead for digital inclusion at Age UK, said: "Older people tell us technology can be daunting and they are not quite sure how to use it or how to get online. Age UK locally helps thousands of people in later life to get to grips with technology, gaining skills and confidence to use the internet.
"EE National Techy Tea Party Day will give older people the chance on the high street to experience what the internet can offer, such as keeping in touch with loved ones, discovering new hobbies, and saving money by shopping around."
Olaf Swantee, chief executive of EE, added: "There are huge benefits to being connected in a world that is becoming increasingly digital, but technology is moving so fast and it can be hard to keep up. Through EE's National Techy Tea Party Day we want to use our staff’s expert knowledge to help those most in need develop these key digital skills."
To mark the announcement, June Whitfield, actress and Age UK ambassador, threw a special Techy Tea Party at the Age UK east London computer centre in Hackney to encourage people to sign up. She discussed the benefits of being connected for older people over tea and biscuits.
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