National Cheetah Day in Iran
National Cheetah Day in Iran is held on August 30. This event in the third decade of the month august is annual.
Yalda Night on December 21 (شب يلدا Shab-e Yalda, Shab-e Chelle - Persian festival held on the longest and darkest night of the year. Celebrated in Iran, Afghanistan and Tajikistan);
Engineer's Day in Iran on February 23 (This day is celebrated to respect Nasir al-Din al-Tusi, Iranian scientist);