Here we take a look back at a few editions of the event from years gone by.
(From left) Michelle McGreavy, Sue Armstrong, Sharon Hughes, Julie Mason and Linda Swindells with the balloons for release at the St Catherines Hospice's Yellow Day in 2010
City of Preston Pipes and Drums at the St Catherines Hospice's Yellow Day in 2010
Cyril Alston, a volunteer on the flower stall at the event in 2013
Nathan Trafford, nine from Leyland at the St Catherines yellow ribbon day in 2004