The family fun and live music event will take place at Lily’s Bar on October 30.
Money raised will go to support the Hayling Island Donkey Sanctuary, which provides ex-working donkeys with a safe and peaceful environment.
There are 23 retired and rescue donkeys at the sanctuary who will benefit from the fundraising event.
Sugar Fest 21 will start with a children’s party from 12pm until 2pm, followed by seven live bands and activities including a raffle, a charity game show, and a head shaving fundraiser running until 11pm.
Adult wristbands are £3 and children go free.
Phill Upshall, a volunteer at the sanctuary, said: ‘People are so kind in helping us look after our 23 retired and rescued donkeys.
‘We intend to have a live nativity at the sanctuary with donkeys and sheep during our Xmas open days.’