Armistice
International law: Under international law, an armistice is a legal agreement (often in a document) that ends fighting between the "belligerent parties" of a war or conflict. At the Hague Convention of 1899, three treaties were agreed and three declarations made. The Convention with respect to the Laws and Customs of War on Land stated, "If [the armistice's] duration is not fixed," the parties may resume fighting (Article 36) as they choose but with proper notifications. That is in comparison to a "fixed duration" armistice in which the parties may renew fighting only at the end of the particular fixed duration. When the belligerent parties say in effect that "this armistice completely ends the fighting" without any end date for the armistice, the duration of the armistice is fixed in the sense that no resumption of the fighting is allowed at any time. For example, the Korean Armistice Agreement calls for a "ceasefire and armistice" and has the "objective of establishing an armistice which will ensure a complete cessation of hostilities and of all acts of armed force in Korea until a final peaceful settlement is achieved."

Armistice Day: Armistice Day (which coincides with Remembrance Day and Veterans Day, public holidays) is commemorated every year on 11 November to mark the Armistice of 11 November 1918 signed between the Allies of World War I and the German Empire at Compiègne, France, for the cessation of hostilities on the Western Front of World War I, which took effect at eleven o'clock in the morning, the "eleventh hour of the eleventh day of the eleventh month" of 1918.
Most countries changed the name of the holiday after World War II to honor veterans of that and subsequent conflicts. Most member states of the Commonwealth of Nations adopted the name Remembrance Day, and the United States chose Veterans Day.

Early modern history: Armistice of Copenhagen of 1537 ended the Danish war known as the Count's Feud
Armistice of Stuhmsdorf of 1635 between the Polish-Lithuanian Commonwealth and Sweden
Peace of Westphalia of 1648 that ended the Thirty Years' War and Eighty Years' War

20th century: 

References: 

External links: 
"Allied Armistice Terms, 11 November 1918". The War to End All Wars. FirstWorldWar.com. Archived from the original on 2 February 2007. Retrieved 2007-01-04.
The Expanded Cease-Fires Data Set Code Book (Emory University)