September 5 2019:  Google  salutes educationists in India on Teachers' Day  2019  with a doodle today.
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. In India Guru Purnima is traditionally observed as a day to venerate teachers, the birthday of the second president Sarvepalli Radhakrishnan (5 September) is celebrated as Teacher's Day since 1962.  When  admirers  wanted to celebrate his birthday, he is known to have said: "Instead of celebrating my birthday, it would be my proud privilege if September 5th is observed as Teachers' Day"
It was an appropriate suggestion:  Dr Radhakrishnan who served as the  first Vice President of India (1952–1962) and the second President of India (1962–1967) was a legendary teacher of philosophy:  Before these positions, he was  Spalding Professor of Eastern Religion and Ethics at University of Oxford (1936–1952) by which he became the first Indian to hold a professorial chair at the University of Oxford. He was Upton Lecturer at Manchester College, Oxford in 1926, 1929, and 1930. In 1930 he was appointed Haskell lecturer in Comparative Religion at the University of Chicago