The Latin word circa, literally meaning about, is often used to describe various dates (often birth and death dates) that are uncertain. For example, one could say that Pearl Harbor was attacked circa (often abbreviated c. or ca.) 1941, if the year were uncertain. The further back in time a given date is, the broader the time period which circa encompasses: Latin is the language that was originally spoken in the region around Rome called Latium. ... Attack on Pearl Harbor Conflict World War II, Pacific War Date December 7, 1941 Place Pearl Harbor, Hawaii Result Japanese victory The Attack on Pearl Harbor occured on the morning of December 7, 1941, when planes and midget submarines of the Imperial Japanese Navy commanded by Vice Admiral Chuichi Nagumo... 1941 was a common year starting on Wednesday (link will take you to calendar). ...

• Within the last hundred years, circa should be accurate to within five years (e.g., 1940, 1945, 1950, 1955);
• Within the last five hundred years, circa should be accurate to within ten years (e.g., 1720, 1730, 1740, 1750);
• Within the last thousand years, circa should be accurate to within twenty-five years (e.g., 1250, 1275, 1300, 1325);
• Within the last two thousand years, circa should be accurate to within fifty years (e.g., 150s, 200s, 250s, 300s);
• Within the span of recorded human history, circa should be accurate to within one hundred to two hundred years.

1940 was a leap year starting on Monday (link will take you to calendar). ... 1945 was a common year starting on Monday (link will take you to calendar). ... 1950 was a common year starting on Sunday (link will take you to calendar). ... 1955 is a common year starting on Saturday of the Gregorian calendar. ... Events January 6 - The Committee of Inquiry on the South Sea Bubble publishes its findings February 11 - Sweden and Prussia sign the (2nd Treaty of Stockholm) declaring peace. ... Events Pope Clement XII elected September 17 - Change of emperor of the Ottoman Empire from Ahmed III (1703-1730) to Mahmud I (1730-1754) Anna Ivanova (Anna I of Russia) became czarina Births May 13 - Charles Watson-Wentworth, 2nd Marquess of Rockingham, Prime Minister of the United Kingdom (d. ... Events May 31 - Friedrich II comes to power in Prussia upon the death of his father, Friedrich Wilhelm I. October 20 - Maria Theresia of Austria inherits the Habsburg hereditary dominions (Austria, Bohemia, Hungary and present-day Belgium). ... Events March 2 - Small earthquake in London April 4 - Small earthquake in Warrington, England August 23 - Small earthquake in Spalding, England September 30 - Small earthquake in Northampton, England November 16 – Westminster Bridge officially opened Jonas Hanway is the first Englishman to use an umbrella James Gray reveals her sex to... Events December 13 - Death of Frederick II, Holy Roman Emperor Louis IX of France is captured by Muslims and has to ransom himself Mabinogion appears Albertus Magnus isolates the element arsenic Vincent of Beauvais writes proto-encyclopedic The Greater Mirror City of Stockholm founded Alphonso III of Portugal takes Algarve... Events Eleanor de Montfort is captured by pirates in the employ of Edward I of England to prevent her marriage to Llywelyn the Last, prince of Jews over the age of 7 to wear the yellow badge and makes usury illegal Jean de Meun writes the second portion of the... Events Beginning of the Renaissance. ... Events Muhammed Tughlaq succeeds his father Ghiyas al-Din Tughlaq as Sultan of Delhi. ... Centuries: 1st century - 2nd century - 3rd century Decades: 100s - 110s - 120s - 130s - 140s - 150s - 160s - 170s - 180s - 190s - 200s 150 151 152 153 154 155 156 157 158 159 Events and trends Significant people Antoninus Pius, Roman Emperor (138-161) Categories: 150s ... Centuries: 2nd century - 3rd century - 4th century Decades: 150s - 160s - 170s - 180s - 190s - 200s - 210s - 220s - 230s - 240s - 250s Years: 200 201 202 203 204 205 206 207 208 209 Significant people Septimius Severus, Roman Emperor Categories: 200s ... Centuries: 2nd century - 3rd century - 4th century Decades: 200s - 210s - 220s - 230s - 240s - 250s - 260s - 270s - 280s - 290s - 300s Years: 250 251 252 253 254 255 256 257 258 259 Events Crisis of the Third Century End of Yayoi era and beginning of Kofun period, the first part of the... Centuries: 3rd century - 4th century - 5th century Decades: 250s - 260s - 270s - 280s - 290s - 300s - 310s - 320s - 330s - 340s - 350s 290 300 301 302 303 304 305 306 307 308 309 Significant people Diocletian, Roman Emperor Maximian, Roman Emperor Categories: 300s ...

Commercial uses

Circa is a brand name in the skateboarding industry which makes shoes, clothing, and skateboards. Professional skateboarders can be signed to the Circa skateboarding team. A post-modern skateboard. ...