May 21st (1155) was a Saturday. It's the 141st day of the year (142nd in leap years) in the Gregorian calendar. There are 224 days left to the end of the year.
May 21st Holidays in History
» Afro-Colombian Day (Colombia)
» Christian feast day:
» Christopher Magallanes
» Eugène de Mazenod
» Constantine the Great and Christianity e.g Emperor Constantine I
» Earliest day on which Corpus Christi (feast) known as Corpus Christi can fall, while June 24 is the latest; held on Thursday after Trinity Sunday. (Roman Catholic Church)
» Helena of Constantinople, also known as "Feast of the Holy Great Sovereigns Constantine and Helen, Equal-to-the-Apostles." (Eastern Orthodox Church)
» May 21 (Eastern Orthodox liturgics)
» Circassian Day of Mourning (Circassians)
» Armed Forces Day Hungary or Day of Patriots and Military (Hungary)
» Navy Day (Chile)
» Saint Helena Day, celebrates the discovery of Saint Helena in 1502.
» World Day for Cultural Diversity for Dialogue and Development (International observance or International)