Hat Day Party this year invites members of communities far and wide to wear their craziest hats to raise funds for research into mental health.

The Australian Rotary Health campaign is being celebrated nationwide and this year and the Rotary Club of Longford hopes to raise $3000 to help the one in five Australians who live with mental illness.

Those attending the Longford event can expect a night of hat-themed games, hat-themed music and several other hat-related surprises.

Longford Rotary secretary James Wilcox said that the event was an opportunity to lift the stigma on mental health in today's society.

"It's a very significant project and really important that people in all communities support it," Mr Wilcox said.

"It's really important to retain that contact because people do become isolated when they're suffering."

Northern Midlands Council community development manager Lorraine Green said that the Hat Day Party was set to be a fun night for a good cause.

"There will be lots of boppy-woppy music to dance along to," Ms Green said.

"People can bring along some dollars, they can vote for the hats, they can buy secondhand books and just appreciate the fact that they are raising money for mental health research."

The Hat Day Party will be held on October 9 at the Longford Memorial Hall, 6pm to 8pm, tickets cost $15.

To RSVP email joiezzi@oneagency.com.au or text a reply to 0418727056.