International Nowruz Day (March 21) was officially recognized by the United Nations General Assembly on March 21, 2010, as an international observance and a shared cultural heritage of several countries. This designation followed a proposal by countries where Nowruz is widely celebrated, including Iran, Afghanistan, Tajikistan, Azerbaijan, India, Kazakhstan, Kyrgyzstan, Pakistan, Turkey, and Uzbekistan. The aim was to honor the cultural traditions of Nowruz and its role in promoting peace, friendship, and coexistence among nations. Nowruz, with deep roots in the history and culture of Iran and the surrounding region, is celebrated annually at the start of spring and the vernal equinox. The festival features diverse customs such as the Haft-Seen table, family gatherings, and public celebrations, and is observed by millions of people worldwide. The inclusion of International Nowruz Day in the Gregorian calendar by the United Nations in 2010 was intended to raise global awareness of the festival and its cultural significance. Since then, UN member states have marked March 21 each year with events and programs dedicated to International Nowruz Day. The observance provides an opportunity to showcase the cultures, music, cuisine, and arts associated with Nowruz on an international stage, and has become a symbol of cultural solidarity and mutual respect among nations.