International Literacy Day is celebrated annually on 8th September to highlight the importance of literacy to individuals, communities, and societies worldwide. The United Nations Educational, Scientific and Cultural Organization (UNESCO) proclaimed the day in 1965.
Step 1: Historical Context
The purpose of the day is to remind people of the importance of literacy, which is a key to improving access to education, promoting equality, and addressing social and economic challenges.
Step 2: Conclusion
Thus, International Literacy Day is observed on 8th September each year.
Final Answer: 8th September.