It's about nine-tenths as long as Pius IX's reign.
In other words, 30 years is 0.948 times the length of Pius IX's reign, and the length of Pius IX's reign is 1.055 times that amount.(a.k.a. Pope Blessed Pius IX, a.k.a. Giovanni Maria Mastai-Ferretti) (1792-1878)
It's about two-and-a-half times as long as FDR's Presidential Term.
In other words, 30 years is 2.478 times the length of FDR's Presidential Term, and the length of FDR's Presidential Term is 0.4036 times that amount.(a.k.a. Franklin Roosevelt, a.k.a. Franklin Delano Roosevelt) (1933-45)
It's about three times as long as King Tut's reign.
In other words, the length of King Tut's reign is 0.3 times 30 years.(a.k.a. Tutankhamun, a.k.a. Tutankhaten, a.k.a. tVwa:t-ʕa:nəx-ʔaˡma:n) (1333 BCE - 1324 BCE)
Pharaoh of the 18th dynasty, Tutankhamun begin his reign at the age of eight in 1333 BCE and remained pharaoh until 1324 BCE — 9 years later. When artifacts from Tut's tomb were on display at the Metropolitan Museum of Art (New York City, New York) from late 1976 to 1979, they were viewed by an estimated 8 million people.
It's about three-tenths as long as Pepi II's reign.
In other words, the length of Pepi II's reign is 3 times 30 years.(a.k.a. Neferkare) (2278 BCE - 2184 BCE)
The sixth dynasty pharaoh of Egypt's Old Kingdom, Pepi II Neferkare ascended to the throne at the age of six and is generally thought to have reigned until his death at the age of one-hundred — a total of 94 years. His reign was the longest of any monarch in history.
It's about three-and-a-half times as long as The Revolutionary War (American).
In other words, 30 years is 3.581 times the length of The Revolutionary War (American), and the length of The Revolutionary War (American) is 0.2793 times that amount.(a.k.a. American War of Independence) (1775-83)
The War between Great Britain and the its thirteen colonies in North America (now the United States) for the independence of the United States is generally considered to have started with the Battle of Lexington and Concord on April 18th, 1775 (sometimes known as "The Shot Heard 'round the World") and to have concluded with the signing of the Treaty of Paris on September 3rd, 1783 — 8.378 years. A total of 25,000 Americans are estimated to have died as a result of the war.
It's about four-and-a-half times as long as The Construction of the Chunnel.
In other words, 30 years is 4.696 times the length of The Construction of the Chunnel, and the length of The Construction of the Chunnel is 0.2129 times that amount.(a.k.a. Channel Tunnel, a.k.a. Le tunnel sous la Manche) (1987 thru 1994) (Folkstone, Kent, UK to Coquelles, Pas-de-Calais, France)
It's about five times as long as World War II.
In other words, 30 years is 4.996 times the length of World War II, and the length of World War II is 0.2002 times that amount.(a.k.a. Second World War, a.k.a. WWII, a.k.a. WW2) (1939 - 1945)