The correct answer is: International Democracy Day.
International Democracy Day is an annual observance held on 15 September to promote and defend democracy around the world. The day was established by the United Nations General Assembly in 2007, following a resolution that was adopted by acclamation.
The resolution recognizes that democracy is a universal value that is essential for the promotion and protection of human rights and fundamental freedoms. It also emphasizes the importance of democracy for sustainable development and peace.
International Democracy Day is an opportunity to celebrate the achievements of democracy and to recommit to the ideals of democracy. It is also a time to reflect on the challenges that democracy faces and to take action to strengthen democracy around the world.
The other options are incorrect because:
- International Teachers Day is celebrated on 5 October.
- World Cancer Day is celebrated on 4 February.
- World Book Day is celebrated on 23 April.