1) 21st November
2) 20th November
3) 19th November
4) 18th November
Explanation:
The world philosophy day is being observed on the 21 November 2019.It is celebrated every year on the 3rd Thursday of November. This day is celebrated to persist the value of philosophy in shaping minds and culture of people. This day was officially announced by UNESCO (United Nations Educational, Scientific and Cultural Organization).