International Day of Yoga is celebrated yearly on 21 June since its commencement in 2015. A global day for yoga was announced consistently by the United Nations General Assembly. Yoga is a physical, mental and otherworldly practice began in India.
The word Yoga is derived from the Sanskrit word 'Yuj' which means to join or unite. The union referred to is that of the individual self-uniting with the cosmic consciousness or the universal spirit. Yoga is believed to have evolved during the period of the 'Sat Yuga', also called the Golden age. It was not until the discovery of the Indus- valley civilization, the largest civilization: that the knowledge about the origin of Yoga surfaced. One of the earliest expositions on Yoga was written by the Indian sage Patanjali. His work, known today as "Patanjali's Yoga Sutras" is widely available on the internet.