Schools, firms and businesses across Calderdale donned Christmas hats to raise awareness about brain cancer.
Happy Hats Day was masterminded by sisters Stevie Stott and Georgette Smith after their dad, Kenneth Russ, was diagnosed with the most aggressive form of brain tumour in May.
After being left devastated by the news, the sisters and their family vowed to do what they could to put the spotlight on the disease and to raise money for The Christie - the oncology unit in Manchester where Kenneth, 59, has received treatment.
The day was a huge success and many, including Bradshaw Primary School, Ash Green Primary School at Mixenden, Halifax Borough Market and Caravan Guard, got into the spirit of the occasion with a ‘hats on’ to cancer.
Stevie, 32, said: “It went really well and it’s now something we want to do every year.
“It’s not just about raising money, it’s about raising awareness.
“It’s been a rubbish time recently, but seeing all the pictures has really cheered us up, it’s been really nice.”
Mungo Sheppard, head teacher at Ash Green Primary School, added: “We had a fantastic, festive, fun filled day wearing our Happy Hats to school.
“The children and staff all joined in to support the fantastic cause and hopefully our enjoyment has helped in some small way to accelerate the research of The Christie Foundation.”
The sisters have also encouraged people to upload Happy Hat selfies to Twitter and Facebook using #HappyHatSelfie and nominating two more people to take their own photo wearing a hat.
Donations can also be made by texting 70070 with code KHHS60 and the amount you would like to donate.