July 20 1944
That sort of virus is known as a "time bomb".
July 20, 1944 Bomb planted in a conference room at the"Wolf's Lair," the Fuhrer's retreat headquarters in Rastenberg, East Prussia. In Sept 1944, a special Wound Badge was issued to those who survived this blast and it has the date embossed on the badge, known as Verwundeten-Abzeichen 20 Juli 1944.List of known Assassination attempts on Nazi leaders http://www.axishistory.com/index.php?id=2972
on Hitlers bithday
Stalingrad
Pompeii did not explode. It was buried in ash and pumice when Vesuvius exploded on the 24th of August in AD 79.
April 18th 1942
August 6 1945
1753
The Atom bomb was dropped on Hiroshima in 1945
The Second of December 1999
On the 20th April 2010.
Logic Bomb They go off when certain conditions are met. One example being a certain date or time.