The mother of teen cancer victim Stephen Sutton has called for well wishers to "do something that makes you and others happy" at 11am on Friday in memory of the inspirational fundraiser.
A two-day vigil is due to start tomorrow for the 19-year-old, who succumbed to the disease earlier this month after raising millions for the Teenage Cancer Trust.
A Thumbs Up For Stephen event - which is being publicised with the social media hashtag #ThumbsupforStephen - will also take place on Friday while the vigil at Lichfield Cathedral in Staffordshire is under way.
Jane Sutton said: "If you can't make it, remember to take a moment at 11am on Friday morning to give a Thumbs up for Stephen.
"This could be via Thunderclap.it, #ThumbsupforStephen, or you could give the thumbs up to a stranger, have a cup of tea and a slice of cake, think a positive thought, clap, cheer, or even perform a random act a kindness.
"Do something that makes you and others happy in Stephen's memory."