| 51181 | May.03 | Death | 2012 – Lloyd Brevett, Jamaican bassist and songwriter (The Skatalites) (b. 1931) |
| 51182 | May.03 | Death | 2012 – Jorge Illueca, Panamanian politician, 30th President of Panama (b. 1918) |
| 51183 | May.03 | Death | 2012 – Felix Werder, German-Australian composer, conductor, and critic (b. 1922) |
| 51184 | May.03 | Death | 2012 – Digby Wolfe, English-Australian actor and screenwriter (b. 1929) |
| 51185 | May.03 | Death | 2013 – Joe Astroth, American baseball player (b. 1922) |
| 51186 | May.03 | Death | 2013 – Herbert Blau, American engineer and academic (b. 1926) |
| 51187 | May.03 | Death | 2013 – Cedric Brooks, Jamaican-American saxophonist and flute player (The Skatalites and The Sound Dimensions) (b. 1943) |
| 51188 | May.03 | Death | 2013 – Keith Carter, American swimmer and soldier (b. 1924) |
| 51189 | May.03 | Death | 2013 – Brad Drewett, Australian tennis player and sportscaster (b. 1958) |
| 51190 | May.03 | Death | 2013 – David Morris Kern, American pharmacist, co-invented Orajel (b. 1909) |
| 51191 | May.03 | Death | 2013 – Curtis Rouse, American football player (b. 1960) |
| 51192 | May.03 | Death | 2013 – Branko Vukelić, Croatian politician, 11th Minister of Defence for Croatia (b. 1958) |
| 51193 | May.03 | Death | 2014 – Gary Becker, American economist and academic, Nobel Prize laureate (b. 1930) |
| 51194 | May.03 | Death | 2014 – Bobby Gregg, American drummer and producer (b. 1936) |
| 51195 | May.03 | Death | 2014 – Francisco Icaza, Mexican painter (b. 1930) |
| 51196 | May.03 | Death | 2014 – Chet Jastremski, American swimmer and physician (b. 1941) |
| 51197 | May.03 | Death | 2014 – Jim Oberstar, American educator and politician (b. 1934) |
| 51198 | May.03 | Death | 2015 – Revaz Chkheidze, Georgian director and screenwriter (b. 1926) |
| 51199 | May.03 | Death | 2015 – Thomas A. Constantine, American police officer (b. 1938) |
| 51200 | May.03 | Death | 2015 – Danny Jones, Welsh rugby player (b. 1986) |
| 51201 | May.03 | Death | 2015 – Warren Smith, American golfer and coach (b. 1915) |
| 51202 | May.03 | Death | 2015 – Abdul Basit Usman, Filipino criminal (b. 1974) |
| 51203 | May.03 | Holiday and observance | Christian feast day:Abhai (Syriac Orthodox Church)Antonia and AlexanderJuvenal of NarniMoura (Coptic Church)Philip and James the LesserPope Alexander ISarah the Martyr (Coptic Church)The Most Holy Virgin Mary Queen of PolandTheodosius of Kiev (Eastern Ort |
| 51204 | May.03 | Holiday and observance | Constitution Memorial Day (Japan) |
| 51205 | May.03 | Holiday and observance | Constitution Day (Poland) |
| 51206 | May.03 | Holiday and observance | Finding of the Holy Cross-related observances:Fiesta de las Cruces (Spain and Hispanic America)Roodmas, or Feast of the Finding of the Holy Cross (Gallican Rite of the Catholic Church) |
| 51207 | May.03 | Holiday and observance | World Press Freedom Day (International) |
| 51208 | May.04 | Event | 1256 – The Augustinian monastic order is constituted at the Lecceto Monastery when Pope Alexander IV issues a papal bull Licet ecclesiae catholicae. |
| 51209 | May.04 | Event | 1415 – Religious reformers John Wycliffe and Jan Hus are condemned as heretics at the Council of Constance. |
| 51210 | May.04 | Event | 1436 – Assassination of the Swedish rebel (later national hero) Engelbrekt Engelbrektsson |