This year represents the fourth edition of the annual event.
Over 150 midlands businesses have already gotten on board for this year's Rainbow Day.
The 4th rendition of the annual event in aid of Laois Offaly Families for Autism takes place this Friday.
It asks people to wear a colourful shirt and contribute €1 to the charity.
The money would be used to support LOFFA, which has over 170 member families, and will go towards subsidising vital services needed for their children such as Occupational Therapy, Speech & Language Therapy, Play Therapy, behavioural therapy and Counselling.
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