World Arthritis Day 2018 is observed on October 12. This day is exclusively meant to raise awareness about arthritis, a condition which affects millions of people across the world. Arthritis is an inflammatory condition which causes pain and stiffness in joints which can worsen with age. The condition is such that it can affect day-to-day functioning of people. On World Arthritis Day, the idea is to raise awareness about arthritis and how it affects lives of people who suffer from it.