The International Day of Yoga is celebrated on June 21st each year. This day was officially designated by the United Nations in 2014 to promote the numerous benefits of yoga and encourage people around the world to incorporate yoga into their daily lives. June 21st was chosen as the International Yoga Day because it corresponds to the summer solstice in the Northern Hemisphere, which has special significance in many cultures. The day aims to raise awareness about the physical, mental, and spiritual benefits of practicing yoga.

The correct answer is Maulana Abul Kalam Azad. India Wins Freedom is an enlightening account of the partition from the author, Maulana Azad's perspective. It includes his personal experiences when India became independent and his ideas on freedom and liberty.

1. World Environment Day is celebrated every year on 5 June.

2. Its objective is to make mankind aware of the environment.

3. First held in 1973, it has been a platform to raise awareness on environmental issues such as marine pollution, overpopulation, global warming, sustainable development and wildlife crime. World Environment Day is a global platform for public outreach, with participation from over 143 countries annually.