23h 35min, mar 3, 1765 y - Stamp Act
Description:
 It was the first internal tax levied directly on American colonists by the British government. The act, which imposed a tax on all paper documents in the colonies, came at a time when the British Empire was deep in debt from the Seven Years’ War (1756-63) and looking to its North American colonies as a revenue source. 
Added to timeline:
Date:
23h 35min, mar 3, 1765 y
Now
 ~ 260 years ago