The Family Holiday Association is encouraging people to wear their shades on April 1 to help raise funds.
The charity, which enables struggling families to enjoy a break at the seaside, wants pictures from the day to be shared across social media in a bid to increase awareness.
By sharing images using the #ShadesDay and #AprilFool hashtags on April 1, agents could be in with a chance of winning a number of prizes.
Those interested in showing their support can set up a fundraising page on the charity’s JustGiving campaign or they can simply text ‘SHAD35 £2’ to 70070 to donate £2.