Some years ago here in the UK a group of comedians got together to raise money for needy causes both here at home in Britain and in Africa. This event was christened 'Comic Relief' and the public were encouraged to wear red noses and do funny things to raise lots of cash.
Over the years this has been thoroughly adopted into the British calendar as 'Red Nose Day' and usually falls on the Friday nearest St. Patrick's Day in March. The BBC host a huge tv marathon all evening and encourage people to ring in and donate.
Lots of schools hold non-uniform days and the kids pay a 'fine' to dress up or wear their own clothes or silly hair do's or all three.
Here are my two youngest who have to wear something too big for them and have silly hair! Their elder sister just had to wear her own clothes so did not look quite as ridiculous.
Thank goodness it's only once a year - it took me the best part of an hour this morning to put all those plaits in her hair!