Kiwis have less than a week left to take on the challenge of going a whole month without alcohol. Organisers of this year's FebFast campaign are encouraging the public to get online, get signed-up and get supporting some great causes.

FebFast encourages people to take a break from alcohol during the shortest month of the year. Participants get sponsored by family and friends to raise money for a number of charities around the country that work with young people affected by alcohol.

FebFast coordinator Catherine Milburn says not drinking for a month is a fun and fantastic challenge and definitely worth the effort.

"Last year's FebFast participants reported feeling healthier and fitter, saving money and losing weight. Who wouldn't like those results?"

But she says FebFast is not just about personal goals and challenges, but about helping those in serious need.

"We Kiwis seem to have a national obsession with alcohol and, while many of us probably drink sensibly, there are a still lot of unfortunate victims of alcohol misuse. Often these are young people, which is why most of the charities FebFast has chosen to support focus on alcohol issues among youth.

"So the small sacrifice of an alcohol-free month will not only have you feeling healthier and wealthier, it will also be a great benefit to many who could use a helping hand."

This year's FebFast charities include: Evolve, a free service for young people in Wellington; The ADHD Association, which also provides substance abuse support; Rainbow Youth in Auckland; and CareNZ in Waikato, which provides addiction services.

Ms Milburn saysFebFast already has a number of high profile celebrities on board this year who are happy to lead the challenge.

"By registering for FebFast you'll be joining some well-known politicians, musicians, comedians, radio hosts and rugby players, so what are you waiting for?"

She says joining FebFast doesn't have to spoil anyone's fun.

"People going to a wedding, birthday party or other special occasion can purchase a time out for the day, and have a guilt-free drink or two if they want."