| 36631 | March 30 | Death | 2015 – Štěpán Kodeda, Czech orienteering competitor (b. 1988) |
| 36632 | March 30 | Death | 2015 – Roger Slifer, American author, illustrator, screenwriter, and producer (b. 1954) |
| 36633 | March 30 | Death | 2015 – Basil Soda, Lebanese fashion designer |
| 36634 | March 30 | Death | 2015 – Ingrid van Houten-Groeneveld, Dutch astronomer and academic (b. 1921) |
| 36635 | March 30 | Death | 2015 – Robert Z'Dar, American actor and producer (b. 1950) |
| 36636 | March 30 | Holiday and observance | Christian feast day:Blessed Amadeus IX of SavoyJohn ClimacusMamertinus of AuxerreQuirinus of NeussThomas Son Chasuhn, Marie-Nicolas-Antoine Daveluy (part of The Korean Martyrs)Tola of ClonardMarch 30 (Eastern Orthodox liturgics) |
| 36637 | March 30 | Holiday and observance | Earliest day on which the first day of Hocktide can fall, while April 3 is the latest observed on the second Monday after Easter. (Hungerford, England popular in medieval England) |
| 36638 | March 30 | Holiday and observance | Land Day commemoration (Palestine / Israel) |
| 36639 | March 30 | Holiday and observance | National Doctors' Day (United States) |
| 36640 | March 30 | Holiday and observance | Spiritual Baptist/Shouter Liberation Day (Trinidad and Tobago) |
| 36641 | March 31 | Event | 307 – After divorcing his wife Minervina, Constantine marries Fausta, the daughter of the retired Roman Emperor Maximian. |
| 36642 | March 31 | Event | 627 – Battle of the Trench: Muhammad undergoes a 14-day siege at Medina (Saudi Arabia) by Meccan forces under Abu Sufyan. |
| 36643 | March 31 | Event | 1146 – Bernard of Clairvaux preaches his famous sermon in a field at Vézelay, urging the necessity of a Second Crusade. Louis VII is present, and joins the Crusade. |
| 36644 | March 31 | Event | 1492 – Queen Isabella of Castille issues the Alhambra Decree, ordering her 150,000 Jewish and Muslim subjects to convert to Christianity or face expulsion. |
| 36645 | March 31 | Event | 1561 – The city of San Cristóbal, Táchira is founded. |
| 36646 | March 31 | Event | 1717 – A sermon on "The Nature of the Kingdom of Christ" by Benjamin Hoadly, the Bishop of Bangor, provokes the Bangorian Controversy. |
| 36647 | March 31 | Event | 1774 – American Revolutionary War: The Kingdom of Great Britain orders the port of Boston, Massachusetts closed pursuant to the Boston Port Act. |
| 36648 | March 31 | Event | 1822 – The massacre of the population of the Greek island of Chios by soldiers of the Ottoman Empire following an attempted rebellion, depicted by the French artist Eugène Delacroix. |
| 36649 | March 31 | Event | 1854 – Commodore Matthew Perry signs the Convention of Kanagawa with the Japanese government, opening the ports of Shimoda and Hakodate to American trade. |
| 36650 | March 31 | Event | 1866 – The Spanish Navy bombs the harbor of Valparaíso, Chile. |
| 36651 | March 31 | Event | 1877 – The family with samurai antecedents that responded to the Saigō army in Ōita Nakatsu, rebels. |
| 36652 | March 31 | Event | 1885 – The United Kingdom establishes the Bechuanaland Protectorate. |
| 36653 | March 31 | Event | 1889 – The Eiffel Tower is officially opened. |
| 36654 | March 31 | Event | 1899 – Malolos, capital of the First Philippine Republic, was captured by American forces. |
| 36655 | March 31 | Event | 1903 – Richard Pearse allegedly makes a powered flight in an early aircraft. |
| 36656 | March 31 | Event | 1906 – The Intercollegiate Athletic Association of the United States (later the National Collegiate Athletic Association) is established to set rules for college sports in the United States. |
| 36657 | March 31 | Event | 1909 – Serbia accepts Austrian control over Bosnia and Herzegovina. |
| 36658 | March 31 | Event | 1909 – Construction of the ill fated RMS Titanic begins. |
| 36659 | March 31 | Event | 1910 – Six North Staffordshire Pottery towns federate to form modern Stoke-on-Trent. |
| 36660 | March 31 | Event | 1913 – The Vienna Concert Society rioted during a performance of modernist music by Arnold Schoenberg, Alban Berg, Alexander von Zemlinsky, and Anton von Webern, causing a premature end to the concert due to violence this concert became known as the Skand |