The World Multiple Sclerosis (MS) Day – Introduced in 2009 by the International Federation of People with Multiple Sclerosis, Multiple Sclerosis International Federation (MSIF) is the only global awareness campaign in MS – MS. Celebrated every year on the last Wednesday in May, with events in more than 60 countries around the world, for wider public awareness of the disease, and how the effects of influence lives of more than two million people suffering from this world.