It's about 95 times as long as The First spaceflight (Sputnik).
In other words, the length of The First spaceflight (Sputnik) is 0.011 times 611 fortnights.(a.k.a. Sputnik 1, a.k.a. Спутник-1, a.k.a. "Satellite-1", a.k.a. Простейший Спутник-1) (1957) (total time in orbit)
It's about 100 times as long as Columbus' voyage to America.
In other words, the length of Columbus' voyage to America is 0.01 times 611 fortnights.(1492) (first voyage)
It's about 150 times as long as The Voyage of the Mayflower.
In other words, the length of The Voyage of the Mayflower is 0.0077 times 611 fortnights.(1620)
It's about 150 times as long as The First US Continental Congress.
In other words, the length of The First US Continental Congress is 0.0059 times 611 fortnights.(1774) (Philadelphia, Pennsylvania)
The First Continental Congress — which included such notable members as Samuel Adams, Thomas Paine, Patrick Henry, John Jay and George Washington — met from September 5th to October 26th, 1774 — a total of 3.6 fortnights. Of the thirteen original American colonies in existence at the time, only the Province of Georgia sent no delegates to the Congress.
It's about 250 times as long as a William Henry Harrison's Presidency.
In other words, 611 fortnights is 271.4 times the length of a William Henry Harrison's Presidency, and the length of a William Henry Harrison's Presidency is 0.003685 times that amount.(a.k.a. William Henry Harrison, a.k.a. "Tippecanoe," a.k.a. "Old Tippecanoe") (1841)
It's about 550 times as long as Boniface VI's reign.
In other words, the length of Boniface VI's reign is 0.0018 times 611 fortnights.(AD 896)
The Church's enigmatic, shortest-reigning Pope, Boniface VI was pontiff for a period of 1.1 fortnights in AD 896 before dying under somewhat mysterious circumstances. His election was subsequently pronounced null by Pope John IX because Boniface had been previously defrocked while serving as a Roman priest.
It's about 1,000 times as long as The Apollo 11 Mission.
In other words, 611 fortnights is 1,051.13 times the length of The Apollo 11 Mission, and the length of The Apollo 11 Mission is 0.000951357 times that amount.(1969) (total mission length)
The first trip by humans to the surface of the Moon, the Apollo 11 Mission began with the launch of the spacecraft from the Kennedy Space Center in Florida on July 16th, 1969 and concluded with the return of the command module on July 24th, 1969 — a total mission time of 0.581279 fortnights. The total time spent by astronauts Neil Armstrong and Edwin "Buzz" Aldrin on the Moon's surface was 0.00777116 fortnights.