Ahead of Mayo Day this Saturday, schools across the county will take part in the My Green and Red Thumb day tomorrow.
This is a road safety campaign, designed to raise awareness of the risks of distraction from using a mobile phone while on roads and streets.
Traditionally, people have put a string on their finger to remind themselves of something - and this original idea for this campaign came from a driver who painted his thumb nail red to remind him not to use his phone while driving - every time he saw his red nail, he was reminded of the message.
Distracted driving is one of the leading causes of fatal road collisions in Ireland, and the Mayo Road Safety Office is urging drivers not to use their phones while driving.
Road Safety Officer Noel Gibbons says drivers who use their phones are four times more likely to crash, killing or injuring themselves or others.
He's calling on people across Mayo to show their support for this event by painting your thumb red and green and posting a picture of it on social media to highlight the dangers of using a phone while on the road.
Schools will get involved by flying the Green & Red flag tomorrow, wearing the Mayo jersey and painting their thumbs green and red, while workplaces are also embracing the campaign.
Meanwhile, Mayo communities worldwide are planning events to celebrate their Mayo heritage on Saturday - the 7th annual Mayo Day.