Answer: October 21
Notes: World Iodine Deficiency Day is observed every year on 21st October to raise awareness about the importance of iodine for good health. It is also known as World Iodine Deficiency Disorder Day. The day highlights the need to prevent iodine deficiency disorders (IDDs), which can cause goitre, mental retardation, and other health issues. Major organisations like the World Health Organisation (WHO) and UNICEF organise campaigns, workshops, and educational programs globally. The initiative began after the 1990 World Summit for Children, where iodine’s significance was recognised. By 2002, global awareness programs expanded, leading to the formal observance of World Iodine Deficiency Day.
