April 21

April 21 is the 111th day of the year (112th in leap years) in the Gregorian calendar. 254 days remain until the end of the year.

First day of the Festival of Riḍván.

• 1963: The first World Congress takes place in London.
• 1963: The first Universal House of Justice is elected by representatives of 56 National Spiritual Assemblies gathered in Haifa, in synchronization with the end of the Ten Year Crusade.
• 1990: Two Knights of Bahá’u’lláh settle on the island of Sakhalin, the last remaining territory named by Shoghi Effendi in his Ten Year Crusade.