Kindness Day UK is celebrated on World Kindness Day, every 13 November. Kindness Day UK is a celebration of kindness, which aims to increase the value of kindness in society as well as increase the amount of kind acts that take place, making kindness a greater part in our daily life. Kindness Day UK is affiliated with the World Kindness Movement (WKM) which is a coalition of like minded organisations containing 18 member nations. It was set up in 2010 by Louise Burfitt-Dons who founded the Cool To Be Kind anti-bullying campaign in 2001 and UK Kindness Movement in 2005 and David Jamilly who founded The Good Deeds Organisation in 2005 and went on to found Kindness UK in 2011. It is now celebrated by a range of charities, associations, businesses, schools, organisations, institutions and individuals across the UK.

Kindness Day UK and World Kindness Day are on 13 November every year and celebrated and promoted by the UK members of the World Kindness Movement. On this date the Kindness Day UK campaign's mission is to make everyone in the UK carry out an act of kindness and take a small 'pause for kindness' to value its importance. As an overall mission, the Kindness Day UK campaign aims to make kindness to people, animals and the environment a bigger part of day-to-day life in the UK.