Year 840 (DCCCXL) was a leap year starting on Thursday (link will display the full calendar) of the Julian calendar.

Millennium: 1st millennium
840 in various calendars
Gregorian calendar840
Ab urbe condita1593
Armenian calendar289
Assyrian calendar5590
Balinese saka calendar761–762
Bengali calendar247
Berber calendar1790
Buddhist calendar1384
Burmese calendar202
Byzantine calendar6348–6349
Chinese calendar己未(Earth Goat)
3536 or 3476
    — to —
庚申年 (Metal Monkey)
3537 or 3477
Coptic calendar556–557
Discordian calendar2006
Ethiopian calendar832–833
Hebrew calendar4600–4601
Hindu calendars
 - Vikram Samvat896–897
 - Shaka Samvat761–762
 - Kali Yuga3940–3941
Holocene calendar10840
Iranian calendar218–219
Islamic calendar225–226
Japanese calendarJōwa 7
Javanese calendar737–738
Julian calendar840
Korean calendar3173
Minguo calendar1072 before ROC
Nanakshahi calendar−628
Seleucid era1151/1152 AG
Thai solar calendar1382–1383
Tibetan calendar阴土羊年
(female Earth-Goat)
966 or 585 or −187
    — to —
(male Iron-Monkey)
967 or 586 or −186
Lothar I
Emperor Lothair I (795–855)


By Place




By topic





  1. ^ Zaluckyj & Zaluckyj, "Decline", pp. 238–239.
  2. ^ History of Central Asia.
840 (number)

840 is the natural number following 839 and preceding 841.

It is a highly composite number,

a superabundant number, an idoneal number,

and is the least common multiple of 1, 2, 3, 4, 5, 6, 7, 8.840 is the largest number k such that all coprime quadratic residues modulo k are squares. In this case, they are 1, 121, 169, 289, 361 and 529.

840 AM

The following radio stations broadcast on AM frequency 840 kHz: WHAS in Louisville, Kentucky is the dominant Class A, clear-channel station on 840 AM, which is a United States clear channel frequency.

840 Naval Air Squadron

840 Naval Air Squadron (840 NAS) was a Naval Air Squadron of the Royal Navy's Fleet Air Arm.

Aero Commander 500 family

The Aero Commander 500 family is a series of light-twin piston-engined and turboprop aircraft originally built by the Aero Design and Engineering Company in the late 1940s, renamed the Aero Commander company in 1950, and a division of Rockwell International from 1965. The initial production version was the 200-mph, seven-seat Aero Commander 520. An improved version, the 500S, manufactured after 1967, is known as the Shrike Commander. Larger variants are known by numerous model names and designations, ranging up to the 330-mph, 11-seat Model 695B/Jetprop 1000B turboprop.

BMW 8 Series

The BMW 8 Series is a range of grand tourers produced by BMW.

The 8 Series was introduced in 1990 under the E31 model code and was only available as a two-door coupé. It is powered by a range of naturally aspirated V8 and V12 petrol engines. The E31 started production just as E24 6 Series production ended, however it is not considered a direct successor. It was later discontinued in 1999 due to poor sales.The model range was later reintroduced in 2018 with the second generation, G15 8 Series. It is expected to launch in coupé (G15), convertible (G14), and four-door Gran Coupé (G16) body styles, as the successor to the F06/F12/F13 6 Series lineup. The G15 8 Series introduces an inline-six diesel engine, and a high-performance M8 model is also expected to be launched in the future.


The Cyclades (; Greek: Κυκλάδες [kikˈlaðes]) are an island group in the Aegean Sea, southeast of mainland Greece and a former administrative prefecture of Greece. They are one of the island groups which constitute the Aegean archipelago. The name refers to the islands around (κυκλάς) the sacred island of Delos. The largest island of the Cyclades is Naxos.

European route E840

European route E 840 is a European B-class road in Italy, connecting the cities Sassari in Sardinia to Tarquinia in mainland Italy where it connects to E80.

Interstate 840 (Tennessee)

Interstate 840 (I-840), formerly State Route 840 (SR 840), also designated as Tennessee National Guard Parkway, is a loop interstate highway around Nashville, Tennessee, built by the Tennessee Department of Transportation (TDOT). First proposed by former Governor Lamar Alexander as part of a system of Bicentennial Parkways, construction began in 1991 and was completed in 2012. The freeway is 77.28 miles (124.37 km) long, and it serves the cities of Lebanon, Murfreesboro, Franklin, and Dickson.In 2015, approval was given by the Federal Highway Administration (FHWA) and the American Association of State Highway and Transportation Officials (AASHTO) to redesignate SR 840 as Interstate 840 (I-840) as part of its integration into the Interstate Highway System. On August 12, 2016, TDOT announced that it would begin re-signing the route on August 14 and that work would be complete later in the year.


KXNT (840 kHz) is an AM radio station licensed to North Las Vegas, Nevada, United States. It is owned by Entercom and carries a talk radio format The station's studios are located in the unincorporated Clark County area of Spring Valley, while KXNT's transmitter is located near Nellis Air Force Base and serves the greater Las Vegas metropolitan area.

KXNT is a Class B station operating on a clear channel frequency. WHAS in Louisville, Kentucky is the dominant Class A station on 840 AM, so KXNT must reduce its power at night, to avoid interfering with WHAS's signal. KXNT operates at 50,000 watts by day and 25,000 watts at night. KXNT has been granted an FCC construction permit to move to the KXST transmitter site and decrease night power to 10,000 watts.KXNT is licensed to broadcast in the HD radio format. It is also heard on the HD-2 channel of sister station 100.5 KXQQ-FM.

Lothair I

Lothair I or Lothar I (Dutch and Medieval Latin: Lotharius, German: Lothar, French: Lothaire, Italian: Lotario) (795 – 29 September 855) was the Holy Roman Emperor (817–855, co-ruling with his father until 840), and the governor of Bavaria (815–817), King of Italy (818–855) and Middle Francia (840–855).

Lothair was the eldest son of the Carolingian emperor Louis the Pious and his wife Ermengarde of Hesbaye, daughter of Ingerman the duke of Hesbaye. On several occasions, Lothair led his full-brothers Pepin I of Aquitaine and Louis the German in revolt against their father to protest against attempts to make their half-brother Charles the Bald a co-heir to the Frankish domains. Upon the father's death, Charles and Louis joined forces against Lothair in a three-year civil war (840–843). The struggles between the brothers led directly to the breakup of the Frankish Empire assembled by their grandfather Charlemagne, and laid the foundation for the development of modern France and Germany.

Louis the Pious

Louis the Pious (778 – 20 June 840), also called the Fair, and the Debonaire, was the King of the Franks and co-Emperor (as Louis I) with his father, Charlemagne, from 813. He was also King of Aquitaine from 781.

As the only surviving adult son of Charlemagne and Hildegard, he became the sole ruler of the Franks after his father's death in 814, a position which he held until his death, save for the period 833–34, during which he was deposed.

During his reign in Aquitaine, Louis was charged with the defence of the empire's southwestern frontier. He conquered Barcelona from the Muslims in 801 and asserted Frankish authority over Pamplona and the Basques south of the Pyrenees in 812. As emperor he included his adult sons, Lothair, Pepin, and Louis, in the government and sought to establish a suitable division of the realm among them. The first decade of his reign was characterised by several tragedies and embarrassments, notably the brutal treatment of his nephew Bernard of Italy, for which Louis atoned in a public act of self-debasement.

In the 830s his empire was torn by civil war between his sons, only exacerbated by Louis's attempts to include his son Charles by his second wife in the succession plans. Though his reign ended on a high note, with order largely restored to his empire, it was followed by three years of civil war. Louis is generally compared unfavourably to his father, though the problems he faced were of a distinctly different sort.

Macintosh Quadra 840AV

The Macintosh Quadra 840AV is a personal computer designed, manufactured and sold by Apple Computer, Inc. from July 1993 to July 1994. It was introduced alongside the Centris 660AV, the "AV" after both model numbers signifying video input and output capabilities, as well as enhanced audio. The 840AV has the same mini tower form factor as the Quadra 800, with a faster Motorola 68040 processor.

The Quadra 840AV was discontinued shortly after the introduction of the PowerPC-based Power Macintosh. The Power Macintosh 8100/80AV provided the same functionality in the same form factor, albeit at a significantly higher price point, while the 7100/66AV was priced comparably to the 840AV but in a IIvx-style desktop case.

Michael III

Michael III (Greek: Μιχαήλ Γʹ, Mikhaēl III; January 19, 840 – September 23/24, 867) was Byzantine Emperor from 842 to 867. Michael III was the third and traditionally last member of the Amorian (or Phrygian) dynasty. He was given the disparaging epithet the Drunkard (ὁ Μέθυσος) by the hostile historians of the succeeding Macedonian dynasty, but modern historical research has rehabilitated his reputation to some extent, demonstrating the vital role his reign played in the resurgence of Byzantine power in the 9th century.

Muhammad at-Taqi (Isma'ili)

Aḥmad ibn Abd Allāh ibn Muḥammad ibn Ismāʿīl (Arabic: أحمد بن عبد اللّه بن محمد بن إسماعي‎), better known as Muhammad at-Taqi (born AH 198 (813/814), died AH 225 (839/840), Salamia, Syria, Imam: AH 212 (827/828)-AH 225 (839/840)) is the ninth Ismāʿīlī Imam . As the Imam, he was the supreme spiritual leader of the Ismāʿīlī community from his appointment until his death. The Nizari and Mustaali trace their Imamate lines from him and his descendants who founded the Fatimid Empire. He was succeeded by his son, Ḥusayn ibn Aḥmad /Raḍī ʿAbd Allāh.

The 8th to 10th Ismāʿīlī Imams were hidden from the public, because of threats from the Abbasid caliphate, and were known by their nicknames. However, the Dawoodi Bohra in their religious text, Taqqarub, claim to have the true names of all 21 imams in sequence including those "hidden" imams: 8th Imam Abdillah-ibne-Mohammad the true name/ (Wafi Ahmad), 9th Imam "Ahmed-ibne-Abdillah (Taqi Muhammad), and the 10th Imam Husain-ibne-Ahmed(Raḍī ʿAbd Allāh).

Oxyrhynchus Gospels

The Oxyrhynchus Gospels are two fragmentary manuscripts discovered among the rich finds of discarded papyri at Oxyrhynchus in Egypt. Unknown to most laymen, they throw light on early non-canonical Gospel traditions.

TWA Flight 840 hijacking

TWA Flight 840 was a Trans World Airlines flight from Leonardo da Vinci International Airport in Rome, Italy to Ben Gurion International Airport in Tel Aviv, Israel, that was hijacked on 29 August 1969. There were no injuries or fatalities, although the aircraft was significantly damaged, and two hostages were held for two months.

In August 1969, leaders in the Palestinian left-wing organization Popular Front for the Liberation of Palestine (PFLP) learned that Yitzhak Rabin, then Israeli Ambassador to the United States, was scheduled to be aboard a Trans World Airlines (TWA) Rome-Athens-Tel Aviv flight. Late that month (on the 29th), two operatives, Leila Khaled and Salim Issawi, hijacked the aircraft. Rabin was not aboard, but American diplomat Thomas D. Boyatt was. The hijackers made the pilots land the aircraft at Damascus International Airport in Syria. They evacuated the aircraft, a Boeing 707, and blew up the nose section of the aircraft. The Syrian authorities arrested the hijackers and immediately released the 12 crew members and 95 passengers, retaining at first six Israeli passengers. Of those, four were released on the 30th. The remaining two Israeli passengers were released in December in return for 71 Syrian and Egyptian soldiers released by Israel. The two Palestinian hijackers had been released without charges in mid-October.The aircraft sustained $4 million in damage. Boeing repaired the aircraft, fitting the nose section diverted from the production line at Renton and outfitted to the aircraft's specifications. The aircraft was re-registered N28714 and returned to service. In March 1980, the aircraft was withdrawn from service and flown to Davis-Monthan Air Force Base for use as spares for the KC-135 Stratotanker fleet of the United States Air Force. The aircraft's registration was canceled in March 1984.

Telephone numbers in Abkhazia

Telephone numbers in Abkhazia use codes owned by Georgia and by Russia.

Formats: +995 44X 2XXXXX / +7 N40 XXX-XX-XX

USS Glennon (DD-840)

USS Glennon (DD-840) was a Gearing-class destroyer of the United States Navy, the second Navy ship named for Rear Admiral James H. Glennon (1857–1940).

Glennon was launched on 14 July 1945 by the Bath Iron Works, Bath, Maine; sponsored by Miss Frances Reading Glennon, granddaughter; and commissioned on 4 October 1945, Commander George W. Pressey in command.

USS Iron County (LST-840)

USS Iron County (LST-840) was an LST-542-class tank landing ship built for the United States Navy during World War II. Named after counties in Michigan, Missouri, Utah, and Wisconsin, she was the only U.S. Naval vessel to bear the name.

Originally laid down as LST-840 by the American Bridge Company of Ambridge, Pennsylvania on 28 September 1944; launched on 15 November, sponsored by Mrs. C. W. Doerr; and commissioned on 11 December with Lieutenant David McC. Bon in command.

Vossloh G2000 BB

The Vossloh G 2000 BB is a four axle heavy shunting and mainline locomotive built at the former MaK plant in Kiel. At the time of its introduction in 2000 it was the most powerful hydraulic transmission locomotive in Vossloh's range.

The Deutsche Bahn AG (DB AG) reporting number for this loco is 253.

This page is based on a Wikipedia article written by authors (here).
Text is available under the CC BY-SA 3.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.