Convert Dates

2 days before January 30, 2012

Want to figure out the date that is exactly one hundred days before Jan 30, 2012 without counting?

Your starting date is January 30, 2012 so that means that 2 days later would be January 28, 2012.

You can check this by using the date difference calculator to measure the number of days before Jan 30, 2012 to Jan 28, 2012.

January 28th, 2012 is a Saturday. It is the 28th day of the year, and in the 4th week of the year (assuming each week starts on a Sunday), or the 1st quarter of the year. There are 31 days in this month. 2012 is a leap year, so there are 366 days in this year. The short form for this date used in the United States is 01/28/2012, and almost everywhere else in the world it's 28/01/2012.

What if you only counted weekdays?

In some cases, you might want to skip weekends and count only the weekdays. This could be useful if you know you have a deadline based on a certain number of business days. If you are trying to see what day falls on the exact date difference of 2 weekdays before Jan 30, 2012, you can count up each day skipping Saturdays and Sundays.

Start your calculation with Jan 30, 2012, which falls on a Monday. Counting forward, the next day would be a Tuesday.

To get exactly one hundred weekdays before Jan 30, 2012, you actually need to count 3 total days (including weekend days). That means that 2 weekdays before Jan 30, 2012 would be January 27, 2012.

If you're counting business days, don't forget to adjust this date for any holidays.

January 27th, 2012 is a Friday. It is the 27th day of the year, and in the 4th week of the year (assuming each week starts on a Sunday), or the 1st quarter of the year. There are 31 days in this month. 2012 is a leap year, so there are 366 days in this year. The short form for this date used in the United States is 01/27/2012, and almost everywhere else in the world it's 27/01/2012.

Enter the number of days and the exact date

Type in the number of days and the exact date to calculate before. If you want to find a previous date, you can enter a negative number to figure out the number of days before the specified date.

Days Before Date Calculator

This site provides an online Days Before Date Calculator to help you find the date that occurs exactly X days before a specific date. You can also enter a negative number to find out when X days before that date happened to fall. You can use this tool to figure out a deadline if you have a certain number of days remaining. Or read the full page to learn more about the due date if you're counting business days or weekdays only, skipping Saturday and Sunday. If you're trying to measure the number of days between two dates, you can switch to the Date Difference Calculator instead.

Day in history for January 30

• January 30, 2013

  1. Naro-1 becomes the first carrier rocket launched by South Korea.

     Naro-1, Launch vehicle

• January 30, 2003

  1. The Kingdom of Belgium officially recognizes same-sex marriages.

     Belgium, Same-sex marriage

• January 30, 2000

  1. Off the coast of Ivory Coast, Kenya Airways Flight 431 crashes into the Atlantic Ocean, killing 169.

     Ivory Coast, Kenya Airways Flight 431

• January 30, 1995

  1. Workers from the National Institutes of Health announce the success of clinical trials testing the first preventive treatment for sickle-cell disease.

     National Institutes of Health, Sickle-cell disease

• January 30, 1989

  1. Closure of the American embassy in Kabul, Democratic Republic of Afghanistan.

     Embassy, Kabul, Democratic Republic of Afghanistan

• January 30, 1982

  1. Richard Skrenta writes the first PC virus code, which is 400 lines long and disguised as an Apple boot program called "Elk Cloner".

     Richard Skrenta, Computer virus, Apple Inc., Elk Cloner

• January 30, 1979

  1. A Varig Boeing 707-323C freighter, flown by the same commander as Flight 820, disappears over the Pacific Ocean 30 minutes after taking off from Tokyo.

     Varig, Boeing 707-323C, Varig Flight 820, 1979 Boeing 707-323C disappearance

• January 30, 1975

  1. The Monitor National Marine Sanctuary is established as the first United States National Marine Sanctuary.

     Monitor National Marine Sanctuary, United States National Marine Sanctuary

• January 30, 1972

  1. The Troubles: Bloody Sunday: British paratroopers open fire on anti-internment marchers in Derry, Northern Ireland, killing 13 people; another person later dies of injuries sustained.

     The Troubles, Bloody Sunday (1972), Parachute Regiment (United Kingdom), Derry, Northern Ireland

• January 30, 1969

  1. The Beatles' last public performance, on the roof of Apple Records in London. The impromptu concert is broken up by the police.

     The Beatles, Apple Records

• January 30, 1968

  1. Vietnam War: Tet Offensive launch by forces of the Viet Cong and North Vietnamese Army against South Vietnam, the United States, and their allies.

     Vietnam War, Tet Offensive, Viet Cong, People's Army of Vietnam

• January 30, 1964

  1. In a bloodless coup, General Nguyễn Khánh overthrows General Dương Văn Minh's military junta in South Vietnam.

     Nguyễn Khánh, 1964 South Vietnamese coup, Dương Văn Minh, South Vietnam

• January 30, 1960

  1. The African National Party is founded in Chad, through the merger of traditionalist parties.

     African National Party, Chad

• January 30, 1959

  1. MS Hans Hedtoft, said to be the safest ship afloat and "unsinkable" like the RMS Titanic, strikes an iceberg on her maiden voyage and sinks, killing all 95 aboard.

     MS Hans Hedtoft, RMS Titanic, Iceberg

• January 30, 1956

  1. African-American civil rights leader Martin Luther King, Jr.'s home is bombed in retaliation for the Montgomery Bus Boycott.

     Martin Luther King, Jr., Montgomery Bus Boycott

• January 30, 1948

  1. Mahatma Gandhi is assassinated by Nathuram Godse, a Hindu extremist.

     Assassination of Mahatma Gandhi, Nathuram Godse

• January 30, 1945

  1. World War II: The Wilhelm Gustloff, overfilled with German refugees, sinks in the Baltic Sea after being torpedoed by a Soviet submarine, killing approximately 9,500 people.

     KdF Ship Wilhelm Gustloff, Refugee, Baltic Sea, Torpedo, Soviet Union

  2. World War II: Raid at Cabanatuan: One hundred twenty-six American Rangers and Filipino resistance fighters liberate over 500 Allied prisoners from the Japanese-controlled Cabanatuan POW camp.

     Raid at Cabanatuan

• January 30, 1944

  1. World War II: The Battle of Cisterna, part of Operation Shingle, begins in central Italy.

     Battle of Cisterna, Operation Shingle

• January 30, 1943

  1. World War II: Second day of the Battle of Rennell Island. The USS Chicago is sunk and a U.S. destroyer is heavily damaged by Japanese torpedoes.

     Battle of Rennell Island, USS Chicago (CA-29), Torpedo

• January 30, 1942

  1. World War II: Battle of Ambon. Japanese forces invade the island of Ambon in the Dutch East Indies. Some 300 captured Allied troops are massacred at Laha airfield. Three-fourths of remaining POWs did not survive at the end of the war, including 250 men who were shipped to Hainan Island in South China Sea and never returned.

     World War II, Battle of Ambon, Empire of Japan, Battle of Ambon, Ambon Island, Dutch East Indies, Prisoner of war, Hainan Island, South China Sea

• January 30, 1933

  1. Adolf Hitler is sworn in as Chancellor of Germany.

     Adolf Hitler, Machtergreifung, Chancellor of Germany (German Reich)

• January 30, 1930

  1. The Politburo of the Soviet Union orders the extermination of the Kulaks.

     Politburo, Kulaks

• January 30, 1925

  1. The Government of Turkey expels Patriarch Constantine VI from Istanbul.

     Turkey, Constantine VI of Constantinople, Istanbul

• January 30, 1916

  1. The McMahon-Hussein Correspondence between Hussein bin Ali, Sharif of Mecca and the British official Henry McMahon concerning the Arab revolt against the Ottoman Empire ends.

     McMahon-Hussein Correspondence, Hussein bin Ali, Sharif of Mecca, Henry McMahon (diplomat), Arab revolt, Ottoman Empire

• January 30, 1911

  1. The destroyer USS Terry makes the first airplane rescue at sea saving the life of Douglas McCurdy ten miles from Havana, Cuba.

     USS Terry (DD-25), Airplane, John Alexander Douglas McCurdy, Havana, Cuba

  2. The Canadian Naval Service becomes the Royal Canadian Navy.

     Royal Canadian Navy

• January 30, 1908

  1. Indian pacifist and leader Mohandas Karamchand Gandhi is released from prison by Jan C. Smuts after being tried and sentenced to two months in jail earlier in the month.

     Mahatma Gandhi, Jan C. Smuts

• January 30, 1902

  1. The first Anglo-Japanese Alliance is signed in London.

     Anglo-Japanese Alliance, London

• January 30, 1889

  1. Archduke Crown Prince Rudolf of Austria, heir to the Austro-Hungarian crown, is found dead with his mistress Baroness Mary Vetsera in the Mayerling.

     Archduke, Crown Prince Rudolf of Austria, Austria-Hungary, Baroness Mary Vetsera, Mayerling Incident

• January 30, 1862

  1. The first American ironclad warship, the USS Monitor is launched.

     Ironclad warship, USS Monitor

• January 30, 1858

  1. The first Hallé concert is given in Manchester, England, marking the official founding of The Hallé orchestra as a full-time, professional orchestra.

     Manchester, The Hallé

• January 30, 1847

  1. Yerba Buena, California is renamed San Francisco, California.

     Yerba Buena, California, San Francisco, California

• January 30, 1835

  1. In the first assassination attempt against a President of the United States, Richard Lawrence attempts to shoot president Andrew Jackson, but fails and is subdued by a crowd, including several congressmen as well as Jackson himself.

     Richard Lawrence (failed assassin), Andrew Jackson

• January 30, 1826

  1. The Menai Suspension Bridge, considered the world's first modern suspension bridge, connecting the Isle of Anglesey to the north West coast of Wales, is opened.

     Menai Suspension Bridge, Isle of Anglesey

• January 30, 1820

  1. Edward Bransfield sights the Trinity Peninsula and claims the discovery of Antarctica.

     Edward Bransfield, Trinity Peninsula, Antarctica

• January 30, 1806

  1. The original Lower Trenton Bridge (also called the Trenton Makes the World Takes Bridge), which spans the Delaware River between Morrisville, Pennsylvania and Trenton, New Jersey, is opened.

     Lower Trenton Bridge, Delaware River, Morrisville, Bucks County, Pennsylvania, Trenton, New Jersey

• January 30, 1789

  1. Tây Sơn forces emerge victorious against Qing armies and liberate the capital Thăng Long.

     Tây Sơn dynasty, Battle of Ngọc Hồi-Đống Đa, Qing dynasty, Thăng Long

• January 30, 1703

  1. The Forty-seven Ronin, under the command of Ōishi Kuranosuke, avenge the death of their master.

     Forty-seven Ronin, Ōishi Kuranosuke

• January 30, 1661

  1. Oliver Cromwell, Lord Protector of the Commonwealth of England, is ritually executed more than two years after his death, on the 12th anniversary of the execution of the monarch he himself deposed.

     Oliver Cromwell, Lord Protector, Commonwealth of England, Posthumous execution, Charles I of England

• January 30, 1649

  1. King Charles I of England is beheaded.

     Charles I of England

• January 30, 1648

  1. Eighty Years' War: The Treaty of Münster and Osnabrück is signed, ending the conflict between the Netherlands and Spain.

     Eighty Years' War, Peace of Münster

• January 30, 1607

  1. An estimated 200 square miles (51,800 ha) along the coasts of the Bristol Channel and Severn Estuary in England are destroyed by massive flooding, resulting in an estimated 2,000 deaths.

     Bristol Channel, Severn Estuary, Bristol Channel floods, 1607

• January 30, 1018

  1. Poland and the Holy Roman Empire conclude the Peace of Bautzen.

     Poland, Peace of Bautzen

• January 1, 1970

  1. The Second Temple of Jerusalem finishes construction.

     Second Temple