| 42811 | April 13 | Death | 2009 – Mark Fidrych, American baseball player (b. 1954) |
| 42812 | April 13 | Death | 2009 – Harry Kalas, American sportscaster (b. 1936) |
| 42813 | April 13 | Death | 2009 – Bruce Snyder, American football player and coach (b. 1940) |
| 42814 | April 13 | Death | 2012 – William B. Buffum, American soldier and diplomat, United States Ambassador to Lebanon (b. 1921) |
| 42815 | April 13 | Death | 2012 – Cecil Chaudhry, Pakistani pilot, academic, and activist (b. 1941) |
| 42816 | April 13 | Death | 2012 – Shūichi Higurashi, Japanese illustrator (b. 1936) |
| 42817 | April 13 | Death | 2012 – Marilyn Lovell Matz, American actress and singer (b. 1931) |
| 42818 | April 13 | Death | 2012 – David S. Smith, American diplomat, United States Ambassador to Sweden (b. 1918) |
| 42819 | April 13 | Death | 2012 – Robert Wigmore, Cook Islander politician, 14th Deputy Prime Minister of the Cook Islands (b. 1949) |
| 42820 | April 13 | Death | 2013 – Frank Bank, American actor (b. 1942) |
| 42821 | April 13 | Death | 2013 – Chi Cheng, American bass player (Deftones) (b. 1970) |
| 42822 | April 13 | Death | 2013 – Stephen Dodgson, English composer and educator (b. 1924) |
| 42823 | April 13 | Death | 2013 – Dean Drummond, American composer and conductor (b. 1949) |
| 42824 | April 13 | Death | 2013 – Ian Henderson, Scottish-Kenyan police officer (b. 1927) |
| 42825 | April 13 | Death | 2013 – Vincent Montana, Jr., American drummer and composer (MFSB and Salsoul Orchestra) (b. 1928) |
| 42826 | April 13 | Death | 2013 – Lin Yang-kang, Taiwanese politician, 29th Vice Premier of the Republic of China (b. 1927) |
| 42827 | April 13 | Death | 2014 – Peter Drummond-Murray of Mastrick (b. 1929) |
| 42828 | April 13 | Death | 2014 – Fred Enke, American football player (b. 1924) |
| 42829 | April 13 | Death | 2014 – Ernesto Laclau, Argentinian-Spanish philosopher and theorist (b. 1935) |
| 42830 | April 13 | Death | 2014 – Michael Ruppert, American journalist and author (b. 1951) |
| 42831 | April 13 | Death | 2014 – Rafał Sznajder, Polish fencer (b. 1972) |
| 42832 | April 13 | Death | 2015 – Gerald Calabrese, American basketball player and politician (b. 1925) |
| 42833 | April 13 | Death | 2015 – Ronnie Carroll, Irish singer and politician (b. 1934) |
| 42834 | April 13 | Death | 2015 – Thelma Coyne Long, Australian tennis player and captain (b. 1918) |
| 42835 | April 13 | Death | 2015 – Eduardo Galeano, Uruguayan journalist and author (b. 1940) |
| 42836 | April 13 | Death | 2015 – Günter Grass, German novelist, poet, playwright, and illustrator, Nobel Prize laureate (b. 1927) |
| 42837 | April 13 | Death | 2015 – Herb Trimpe, American author and illustrator (b. 1939) |
| 42838 | April 13 | Holiday and observance | Christian feast day:HermenegildPope Martin IApril 13 (Eastern Orthodox liturgics) |
| 42839 | April 13 | Holiday and observance | Jefferson's Birthday (United States) |
| 42840 | April 13 | Holiday and observance | New Year festivals in South and Southeast Asian cultures. (see April 14):Cambodian New YearFirst day of Songkran (Lao)First day of Songkran (Thailand) |