Teachers' Day is a special day for the appreciation of teachers, and may include celebrations to honour them for their special contributions in a particular field area, or the community in general. The idea of celebrating Teachers' Day took root in many countries during the 19th century; in most cases, they celebrate a local educator or an important milestone in education. This is the primary reason why countries celebrate this day on different dates, unlike many other International Days In India Guru Purnima is traditionally observed as a day to venerate teachers, the birthday of the second president SarvepalliRadhakrishnan (5 September) is also celebrated as Teacher's Day since 1962. Many countries celebrate World Teachers' Day, established by UNESCO in 1994, on 5 October as their Teachers' Day Guru Purnima is an Indian and Nepalese festival dedicated to spiritual and academic teachers. This festival is traditionally celebrated by Hindus, Jains and Buddhists, to pay their respects to their teachers and express their gratitude. The festival is celebrated on the full moon day (Purnima) in the Hindu month of Ashadha (June–July) in the Hindu calendar of India and Nepal. This day marks the first peak of the lunar cycle after the peakof the solar cycle. The celebration is marked by ritualistic respect to the Guru, Guru Puja. The birth date of the second President of India, Dr. SarvepalliRadhakrishnan, 5 September 1888, has been celebrated as Teacher's Day since 1962. On this day, teachers and students report to school as usual but the usual activities and classes are replaced by activities of celebration, thanks and remembrance. In some schools, senior students take the responsibility of teaching in order to show their appreciation for the teachers.