Heads up! April 19th is Patriots' Day. The day of the "shot heard 'round the world." Historically a lot of dodgy things have happened around this time, esp. during recent years:
April 18, 1775 - Paul Revere & William Dawes ride from Charleston to Lexington warning the "regulars are coming!"
April 18, 1783 - Fighting ceases in the American Revolution, eight years to the day since it began.
April 18, 1906 - San Francisco earthquake and fire kills nearly 4,000 while destroying 75% of the city
April 18, 1983 - A lone suicide bomber kills 63, at US Embassy in Lebanon
April 19, 1775 - American Revolution begins - Lexington Common, shot "heard round the world"
April 19, 1933 - FDR announces US will leave gold standard
April 19, 1993 - After a 51 day siege by the FBI 76 Branch Davidians die in a fire near Waco Texas (accident, suicide, tear gas are disputed causes)
April 19, 1995 - Truck bomb at Federal Building in Oklahoma City, kills 168 & injures 500
April 19, 2013 - Boston bombing suspects killed and captured in Boston after 4 days
April 20, 1999 - Eric Harris and Dylan Klebold went on a shooting spree at Columbine High School in Littleton, Colo. 14 students (including the shooters) and 1 teacher were killed; 23 others were wounded.
April 20, 2010 - An explosion on a BP oil drilling rig off the coast of Louisiana kills 11 people and injures 17.
Sources: http://www.infoplease.com/dayinhistory and http://www.historyorb.com