International Tea Day: International Tea Day is observed annually on May 21, according to the United Nations. The concerning resolution was adopted on December 21, 2019, and calls on the United Nations Food and Agriculture Organization (FAO) to lead the observance of the Day. Wikipedia
World Day for Cultural Diversity for Dialogue and Development: The World Day for Cultural Diversity for Dialogue and Development, sometimes abbreviated World Day for Cultural Diversity, is a United Nations sanctioned observance day for the promotion of diversity and intercultural dialogue. Begun in 2002, it is celebrated on 21 May. It was established by UNESCO in response to the 2001 Taliban terrorist attack that destroyed the Bamiyan Buddha statues in Afghanistan. Wikipedia