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Following Bandung, Nasser officially adopted the "positive neutralism" of Yugoslavian president Josip Broz Tito and Indian Prime Minister Jawaharlal Nehru as a principal theme of Egyptian foreign policy regarding the Cold War. Nasser was welcomed by large crowds of people lining the streets of Cairo on his return to Eg...
In January 1956, the new Constitution of Egypt was drafted, entailing the establishment of a single-party system under the National Union (NU), a movement Nasser described as the "cadre through which we will realize our revolution". The NU was a reconfiguration of the Liberation Rally, which Nasser determined had faile...
Nasser's nomination for the post and the new constitution were put to public referendum on 23 June and each was approved by an overwhelming majority. A 350-member National Assembly was established, elections for which were held in July 1957. Nasser had ultimate approval over all the candidates. The constitution granted...
After the three-year transition period ended with Nasser's official assumption of power, his domestic and independent foreign policies increasingly collided with the regional interests of the UK and France. The latter condemned his strong support for Algerian independence, and the UK's Eden government was agitated by N...
Nasser was informed of the British–American withdrawal via a news statement while aboard a plane returning to Cairo from Belgrade, and took great offense. Although ideas for nationalizing the Suez Canal were in the offing after the UK agreed to withdraw its military from Egypt in 1954 (the last British troops left on 1...
On 26 July 1956, Nasser gave a speech in Alexandria announcing the nationalization of the Suez Canal Company as a means to fund the Aswan Dam project in light of the British–American withdrawal. In the speech, he denounced British imperialism in Egypt and British control over the canal company's profits, and upheld tha...
The nationalization announcement was greeted very emotionally by the audience and, throughout the Arab world, thousands entered the streets shouting slogans of support. US ambassador Henry A. Byroade stated, "I cannot overemphasize [the] popularity of the Canal Company nationalization within Egypt, even among Nasser's ...
France and the UK, the largest shareholders in the Suez Canal Company, saw its nationalization as yet another hostile measure aimed at them by the Egyptian government. Nasser was aware that the canal's nationalization would instigate an international crisis and believed the prospect of military intervention by the two ...
On 29 October 1956, Israeli forces crossed the Sinai Peninsula, overwhelmed Egyptian army posts, and quickly advanced to their objectives. Two days later, British and French planes bombarded Egyptian airfields in the canal zone. Nasser ordered the military's high command to withdraw the Egyptian Army from Sinai to bols...
Despite the commanded withdrawal of Egyptian troops, about 2,000 Egyptian soldiers were killed during engagement with Israeli forces, and some 5,000 Egyptian soldiers were captured by the Israeli Army. Amer and Salah Salem proposed requesting a ceasefire, with Salem further recommending that Nasser surrender himself to...
It was at Port Said that Nasser saw a confrontation with the invading forces as being the strategic and psychological focal point of Egypt's defense. A third infantry battalion and hundreds of national guardsmen were sent to the city as reinforcements, while two regular companies were dispatched to organize popular res...
The U.S. Eisenhower administration condemned the tripartite invasion, and supported UN resolutions demanding withdrawal and a United Nations Emergency Force (UNEF) to be stationed in Sinai. Nasser commended Eisenhower, stating he played the "greatest and most decisive role" in stopping the "tripartite conspiracy". By t...
By 1957, pan-Arabism was the dominant ideology of the Arab world, and the average Arab citizen considered Nasser his undisputed leader. Historian Adeed Dawisha credited Nasser's status to his "charisma, bolstered by his perceived victory in the Suez Crisis". The Cairo-based Voice of the Arabs radio station spread Nasse...
In January 1957, the US adopted the Eisenhower Doctrine and pledged to prevent the spread of communism and its perceived agents in the Middle East. Although Nasser was an opponent of communism in the region, his promotion of pan-Arabism was viewed as a threat by pro-Western states in the region. Eisenhower tried to iso...
Relations between Nasser and King Hussein deteriorated in April when Hussein implicated Nasser in two coup attempts against him—although Nasser's involvement was never established—and dissolved al-Nabulsi's cabinet. Nasser subsequently slammed Hussein on Cairo radio as being "a tool of the imperialists". Relations with...
By the end of 1957, Nasser nationalized all remaining British and French assets in Egypt, including the tobacco, cement, pharmaceutical, and phosphate industries. When efforts to offer tax incentives and attract outside investments yielded no tangible results, he nationalized more companies and made them a part of his ...
As political instability grew in Syria, delegations from the country were sent to Nasser demanding immediate unification with Egypt. Nasser initially turned down the request, citing the two countries' incompatible political and economic systems, lack of contiguity, the Syrian military's record of intervention in politi...
While Nasser was in Syria, King Saud planned to have him assassinated on his return flight to Cairo. On 4 March, Nasser addressed the masses in Damascus and waved before them the Saudi check given to Syrian security chief and Nasser supporter Abdel Hamid Sarraj to shoot down Nasser's plane. As a consequence of Saud's s...
A day after announcing the attempt on his life, Nasser established a new provisional constitution proclaiming a 600-member National Assembly (400 from Egypt and 200 from Syria) and the dissolution of all political parties. Nasser gave each of the provinces two vice-presidents: Boghdadi and Amer in Egypt, and Sabri al-A...
In Lebanon, clashes between pro-Nasser factions and supporters of staunch Nasser opponent, then-President Camille Chamoun, culminated in civil strife by May. The former sought to unite with the UAR, while the latter sought Lebanon's continued independence. Nasser delegated oversight of the issue to Sarraj, who provided...
On 14 July, Iraqi army officers Abdel Karim Qasim and Abdel Salam Aref overthrew the Iraqi monarchy and, the next day, Iraqi prime minister and Nasser's chief Arab antagonist, Nuri al-Said, was killed. Nasser recognized the new government and stated that "any attack on Iraq was tantamount to an attack on the UAR". On 1...
In the fall of 1958, Nasser formed a tripartite committee consisting of Zakaria Mohieddin, al-Hawrani, and Salah Bitar to oversee developments in Syria. By moving the latter two, who were Ba'athists, to Cairo, he neutralized important political figures who had their own ideas about how Syria should be run. He put Syria...
Relations between Nasser and Qasim grew increasingly bitter on 9 March, after Qasim's forces suppressed a rebellion in Mosul, launched a day earlier by a pro-Nasser Iraqi RCC officer backed by UAR authorities. Nasser had considered dispatching troops to aid his Iraqi sympathizers, but decided against it. He clamped dow...
Opposition to the union mounted among some of Syria's key elements, namely the socioeconomic, political, and military elites. In response to Syria's worsening economy, which Nasser attributed to its control by the bourgeoisie, in July 1961, Nasser decreed socialist measures that nationalized wide-ranging sectors of the...
On 28 September 1961, secessionist army units launched a coup in Damascus, declaring Syria's secession from the UAR. In response, pro-union army units in northern Syria revolted and pro-Nasser protests occurred in major Syrian cities. Nasser sent Egyptian special forces to Latakia to bolster his allies, but withdrew th...
Nasser's regional position changed unexpectedly when Yemeni officers led by Nasser supporter Abdullah al-Sallal overthrew Imam Badr of North Yemen on 27 September 1962. Al-Badr and his tribal partisans began receiving increasing support from Saudi Arabia to help reinstate the kingdom, while Nasser subsequently accepted...
On 8 February 1963, a military coup in Iraq led by a Ba'athist–Nasserist alliance toppled Qasim, who was subsequently shot dead. Abdel Salam Aref, a Nasserist, was chosen to be the new president. A similar alliance toppled the Syrian government on 8 March. On 14 March, the new Iraqi and Syrian governments sent Nasser d...
In January 1964, Nasser called for an Arab League summit in Cairo to establish a unified Arab response against Israel's plans to divert the Jordan River's waters for economic purposes, which Syria and Jordan deemed an act of war. Nasser blamed Arab divisions for what he deemed "the disastrous situation". He discouraged...
After years of foreign policy coordination and developing ties, Nasser, President Sukarno of Indonesia, President Tito of Yugoslavia, and Prime Minister Nehru of India founded the Non-Aligned Movement (NAM) in 1961. Its declared purpose was to solidify international non-alignment and promote world peace amid the Cold W...
Nasser played a significant part in the strengthening of African solidarity in the late 1950s and early 1960s, although his continental leadership role had increasingly passed to Algeria since 1962. During this period, Nasser made Egypt a refuge for anti-colonial leaders from several African countries and allowed the b...
In 1961, Nasser sought to firmly establish Egypt as the leader of the Arab world and to promote a second revolution in Egypt with the purpose of merging Islamic and socialist thinking. To achieve this, he initiated several reforms to modernize al-Azhar, which serves as the de facto leading authority in Sunni Islam, and...
Following Syria's secession, Nasser grew concerned with Amer's inability to train and modernize the army, and with the state within a state Amer had created in the military command and intelligence apparatus. In late 1961, Nasser established the Presidential Council and decreed it the authority to approve all senior mi...
In early 1962 Nasser again attempted to wrest control of the military command from Amer. Amer responded by directly confronting Nasser for the first time and secretly rallying his loyalist officers. Nasser ultimately backed down, wary of a possible violent confrontation between the military and his civilian government....
In October 1961, Nasser embarked on a major nationalization program for Egypt, believing the total adoption of socialism was the answer to his country's problems and would have prevented Syria's secession. In order to organize and solidify his popular base with Egypt's citizens and counter the army's influence, Nasser ...
Nasser also attempted to maintain oversight of the country's civil service to prevent it from inflating and consequently becoming a burden to the state. New laws provided workers with a minimum wage, profit shares, free education, free health care, reduced working hours, and encouragement to participate in management. ...
During the presidential referendum in Egypt, Nasser was re-elected to a second term as UAR president and took his oath on 25 March 1965. He was the only candidate for the position, with virtually all of his political opponents forbidden by law from running for office, and his fellow party members reduced to mere follow...
In mid May 1967, the Soviet Union issued warnings to Nasser of an impending Israeli attack on Syria, although Chief of Staff Mohamed Fawzi considered the warnings to be "baseless". According to Kandil, without Nasser's authorization, Amer used the Soviet warnings as a pretext to dispatch troops to Sinai on 14 May, and ...
On 21 May, Amer asked Nasser to order the Straits of Tiran blockaded, a move Nasser believed Israel would use as a casus belli. Amer reassured him that the army was prepared for confrontation, but Nasser doubted Amer's assessment of the military's readiness. According to Nasser's vice president Zakaria Mohieddin, altho...
According to Sadat, it was only when the Israelis cut off the Egyptian garrison at Sharm el-Sheikh that Nasser became aware of the situation's gravity. After hearing of the attack, he rushed to army headquarters to inquire about the military situation. The simmering conflict between Nasser and Amer subsequently came to...
During the first four days of the war, the general population of the Arab world believed Arab radio station fabrications of imminent Arab victory. On 9 June, Nasser appeared on television to inform Egypt's citizens of their country's defeat. He announced his resignation on television later that day, and ceded all presi...
On 11 July, Nasser replaced Amer with Mohamed Fawzi as general commander, over the protestations of Amer's loyalists in the military, 600 of whom marched on army headquarters and demanded Amer's reinstatement. After Nasser sacked thirty of the loyalists in response, Amer and his allies devised a plan to topple him on 2...
At the 29 August Arab League summit in Khartoum, Nasser's usual commanding position had receded as the attending heads of state expected Saudi King Faisal to lead. A ceasefire in the Yemen War was declared and the summit concluded with the Khartoum Resolution. The Soviet Union soon resupplied the Egyptian military with...
Nasser appointed himself the additional roles of prime minister and supreme commander of the armed forces on 19 June 1967. Angry at the military court's perceived leniency with air force officers charged with negligence during the 1967 war, workers and students launched protests calling for major political reforms in l...
On 30 March, Nasser proclaimed a manifesto stipulating the restoration of civil liberties, greater parliamentary independence from the executive, major structural changes to the ASU, and a campaign to rid the government of corrupt elements. A public referendum approved the proposed measures in May, and held subsequent ...
Meanwhile, in January 1968, Nasser commenced the War of Attrition to reclaim territory captured by Israel, ordering attacks against Israeli positions east of the then-blockaded Suez Canal. In March, Nasser offered Yasser Arafat's Fatah movement arms and funds after their performance against Israeli forces in the Battle...
Israel retaliated against Egyptian shelling with commando raids, artillery shelling and air strikes. This resulted in an exodus of civilians from Egyptian cities along the Suez Canal's western bank. Nasser ceased all military activities and began a program to build a network of internal defenses, while receiving the fi...
In June 1970, Nasser accepted the US-sponsored Rogers Plan, which called for an end to hostilities and an Israeli withdrawal from Egyptian territory, but it was rejected by Israel, the PLO, and most Arab states except Jordan. Nasser had initially rejected the plan, but conceded under pressure from the Soviet Union, whi...
As the summit closed on 28 September 1970, hours after escorting the last Arab leader to leave, Nasser suffered a heart attack. He was immediately transported to his house, where his physicians tended to him. Nasser died several hours later, around 6:00 p.m. Heikal, Sadat, and Nasser's wife Tahia were at his deathbed. ...
Following the announcement of Nasser's death, Egypt and the Arab world were in a state of shock. Nasser's funeral procession through Cairo on 1 October was attended by at least five million mourners. The 10-kilometer (6.2 mi) procession to his burial site began at the old RCC headquarters with a flyover by MiG-21 jets....
Because of his ability to motivate nationalistic passions, "men, women, and children wept and wailed in the streets" after hearing of his death, according to Nutting. The general Arab reaction was one of mourning, with thousands of people pouring onto the streets of major cities throughout the Arab world. Over a dozen ...
Nasser made Egypt fully independent of British influence, and the country became a major power in the developing world under his leadership. One of Nasser's main domestic efforts was to establish social justice, which he deemed a prerequisite to liberal democracy. During his presidency, ordinary citizens enjoyed unprec...
The national economy grew significantly through agrarian reform, major modernization projects such as the Helwan steel works and the Aswan Dam, and nationalization schemes such as that of the Suez Canal. However, the marked economic growth of the early 1960s took a downturn for the remainder of the decade, only recover...
During Mubarak's presidency, Nasserist political parties began to emerge in Egypt, the first being the Arab Democratic Nasserist Party (ADNP). The party carried minor political influence, and splits between its members beginning in 1995 resulted in the gradual establishment of splinter parties, including Hamdeen Sabahi...
Nasser was known for his intimate relationship with ordinary Egyptians. His availability to the public, despite assassination attempts against him, was unparalleled among his successors. A skilled orator, Nasser gave 1,359 speeches between 1953 and 1970, a record for any Egyptian head of state. Historian Elie Podeh wro...
While Nasser was increasingly criticized by Egyptian intellectuals following the Six-Day War and his death in 1970, the general public was persistently sympathetic both during and after Nasser's life. According to political scientist Mahmoud Hamad, writing in 2008, "nostalgia for Nasser is easily sensed in Egypt and al...
Nasser's Egyptian detractors considered him a dictator who thwarted democratic progress, imprisoned thousands of dissidents, and led a repressive administration responsible for numerous human rights violations. Islamists in Egypt, particularly members of the politically persecuted Brotherhood, viewed Nasser as oppressi...
Some of Nasser's liberal and Islamist critics in Egypt, including the founding members of the New Wafd Party and writer Jamal Badawi, dismissed Nasser's popular appeal with the Egyptian masses during his presidency as being the product of successful manipulation and demagoguery. Egyptian political scientist Alaa al-Din...
American political scientist Mark Cooper asserted that Nasser's charisma and his direct relationship with the Egyptian people "rendered intermediaries (organizations and individuals) unnecessary". He opined that Nasser's legacy was a "guarantee of instability" due to Nasser's reliance on personal power and the absence ...
Zakaria Mohieddin, who was Nasser's vice president, said that Nasser gradually changed during his reign. He ceased consulting his colleagues and made more and more of the decisions himself. Although Nasser repeatedly said that a war with Israel will start at a time of his, or Arab, choosing, on 1967 he started a bluffi...
Through his actions and speeches, and because he was able to symbolize the popular Arab will, Nasser inspired several nationalist revolutions in the Arab world. He defined the politics of his generation and communicated directly with the public masses of the Arab world, bypassing the various heads of states of those co...
To varying degrees, Nasser's statist system of government was continued in Egypt and emulated by virtually all Arab republics, namely Algeria, Syria, Iraq, Tunisia, Yemen, Sudan, and Libya. Ahmed Ben Bella, Algeria's first president, was a staunch Nasserist. Abdullah al-Sallal drove out the king of North Yemen in the n...
In 1963, Egyptian director Youssef Chahine produced the film El Nasser Salah El Dine ("Saladin The Victorious"), which intentionally drew parallels between Saladin, considered a hero in the Arab world, and Nasser and his pan-Arabist policies. Nasser is played by Ahmed Zaki in Mohamed Fadel's 1996 Nasser 56. The film se...
In 1944, Nasser married Tahia Kazem, the 22-year-old daughter of a wealthy Iranian father and an Egyptian mother, both of whom died when she was young. She was introduced to Nasser through her brother, Abdel Hamid Kazim, a merchant friend of Nasser's, in 1943. After their wedding, the couple moved into a house in Mansh...
Nasser had few personal vices other than chain smoking. He maintained 18-hour workdays and rarely took time off for vacations. The combination of smoking and working long hours contributed to his poor health. He was diagnosed with diabetes in the early 1960s and by the time of his death in 1970, he also had arterioscle...
Pope Saint John XXIII (Latin: Ioannes XXIII; Italian: Giovanni XXIII) born Angelo Giuseppe Roncalli,[a] Italian pronunciation: [ˈandʒelo dʒuˈzɛppe roŋˈkalli]; 25 November 1881 – 3 June 1963) reigned as Pope from 28 October 1958 to his death in 1963 and was canonized on 27 April 2014. Angelo Giuseppe Roncalli was the fo...
Roncalli was elected pope on 28 October 1958 at age 76 after 11 ballots. His selection was unexpected, and Roncalli himself had come to Rome with a return train ticket to Venice. He was the first pope to take the pontifical name of "John" upon election in more than 500 years, and his choice settled the complicated ques...
Pope John XXIII did not live to see the Vatican Council to completion. He died of stomach cancer on 3 June 1963, four and a half years after his election and two months after the completion of his final and famed encyclical, Pacem in terris. He was buried in the Vatican grottoes beneath Saint Peter's Basilica on 6 June...
The Roman Catholic Church celebrates his feast day not on the date of his death, June 3, as is usual, nor even on the day of his papal inauguration (as is sometimes done with Popes who are Saints, such as with John Paul II) but on 11 October, the day of the first session of the Second Vatican Council. This is understan...
In February 1925, the Cardinal Secretary of State Pietro Gasparri summoned him to the Vatican and informed him of Pope Pius XI's decision to appoint him as the Apostolic Visitor to Bulgaria (1925–35). On 3 March, Pius XI also named him for consecration as titular archbishop of Areopolis, Jordan. Roncalli was initially ...
On 30 November 1934, he was appointed Apostolic Delegate to Turkey and Greece and titular archbishop of Mesembria, Bulgaria. Thus, he is known as "the Turcophile Pope," by the Turkish society which is predominantly Muslim. Roncalli took up this post in 1935 and used his office to help the Jewish underground in saving t...
In February 1939, he received news from his sisters that his mother was dying. On 10 February 1939, Pope Pius XI died. Roncalli was unable to see his mother for the end as the death of a pontiff meant that he would have to stay at his post until the election of a new pontiff. Unfortunately, she died on 20 February 1939...
On 12 January 1953, he was appointed Patriarch of Venice and, accordingly, raised to the rank of Cardinal-Priest of Santa Prisca by Pope Pius XII. Roncalli left France for Venice on 23 February 1953 stopping briefly in Milan and then to Rome. On 15 March 1953, he took possession of his new diocese in Venice. As a sign ...
His sister Ancilla would soon be diagnosed with stomach cancer in the early 1950s. Roncalli's last letter to her was dated on 8 November 1953 where he promised to visit her within the next week. He could not keep that promise, as Ancilla died on 11 November 1953 at the time when he was consecrating a new church in Veni...
Following the death of Pope Pius XII on 9 October 1958, Roncalli watched the live funeral on his last full day in Venice on 11 October. His journal was specifically concerned with the funeral and the abused state of the late pontiff's corpse. Roncalli left Venice for the conclave in Rome well aware that he was papabile...
Many had considered Giovanni Battista Montini, the Archbishop of Milan, a possible candidate, but, although he was the archbishop of one of the most ancient and prominent sees in Italy, he had not yet been made a cardinal. Though his absence from the 1958 conclave did not make him ineligible – under Canon Law any Catho...
Roncalli was summoned to the final ballot of the conclave at 4:00 pm. He was elected pope at 4:30 pm with a total of 38 votes. After the long pontificate of Pope Pius XII, the cardinals chose a man who – it was presumed because of his advanced age – would be a short-term or "stop-gap" pope. They wished to choose a cand...
Far from being a mere "stopgap" pope, to great excitement, John XXIII called for an ecumenical council fewer than ninety years after the First Vatican Council (Vatican I's predecessor, the Council of Trent, had been held in the 16th century). This decision was announced on 29 January 1959 at the Basilica of Saint Paul ...
John XXIII was an advocate for human rights which included the unborn and the elderly. He wrote about human rights in his Pacem in terris. He wrote, "Man has the right to live. He has the right to bodily integrity and to the means necessary for the proper development of life, particularly food, clothing, shelter, medic...
Maintaining continuity with his predecessors, John XXIII continued the gradual reform of the Roman liturgy, and published changes that resulted in the 1962 Roman Missal, the last typical edition containing the Tridentine Mass established in 1570 by Pope Pius V at the request of the Council of Trent and whose continued ...
On 11 October 1962, the first session of the Second Vatican Council was held in the Vatican. He gave the Gaudet Mater Ecclesia speech, which served as the opening address for the council. The day was basically electing members for several council commissions that would work on the issues presented in the council. On th...
The first session ended in a solemn ceremony on 8 December 1962 with the next session scheduled to occur in 1963 from 12 May to 29 June – this was announced on 12 November 1962. John XXIII's closing speech made subtle references to Pope Pius IX, and he had expressed the desire to see Pius IX beatified and eventually ca...
Pope John XXIII offered to mediate between US President John F. Kennedy and Nikita Khrushchev during the Cuban Missile Crisis in October 1962. Both men applauded the pope for his deep commitment to peace. Khrushchev would later send a message via Norman Cousins and the letter expressed his best wishes for the pontiff's...
On 10 May 1963, John XXIII received the Balzan Prize in private at the Vatican but deflected achievements of himself to the five popes of his lifetime, Pope Leo XIII to Pius XII. On 11 May, the Italian President Antonio Segni officially awarded Pope John XXIII with the Balzan Prize for his engagement for peace. While i...
On 25 May 1963, the pope suffered another haemorrhage and required several blood transfusions, but the cancer had perforated the stomach wall and peritonitis soon set in. The doctors conferred in a decision regarding this matter and John XXIII's aide Loris F. Capovilla broke the news to him saying that the cancer had d...
"At 11 am Petrus Canisius Van Lierde as Papal Sacristan was at the bedside of the dying pope, ready to anoint him. The pope began to speak for the very last time: "I had the great grace to be born into a Christian family, modest and poor, but with the fear of the Lord. My time on earth is drawing to a close. But Christ...
John XXIII died of peritonitis caused by a perforated stomach at 19:49 local time on 3 June 1963 at the age of 81, ending a historic pontificate of four years and seven months. He died just as a Mass for him finished in Saint Peter's Square below, celebrated by Luigi Traglia. After he died, his brow was ritually tapped...
On 3 December 1963, US President Lyndon B. Johnson posthumously awarded him the Presidential Medal of Freedom, the United States' highest civilian award, in recognition of the good relationship between Pope John XXIII and the United States of America. In his speech on 6 December 1963, Johnson said: "I have also determi...
He was known affectionately as "Good Pope John". His cause for canonization was opened under Pope Paul VI during the final session of the Second Vatican Council on 18 November 1965, along with the cause of Pope Pius XII. On 3 September 2000, John XXIII was declared "Blessed" alongside Pope Pius IX by Pope John Paul II,...
The 50th anniversary of his death was celebrated on 3 June 2013 by Pope Francis, who visited his tomb and prayed there, then addressing the gathered crowd and spoke about the late pope. The people that gathered there at the tomb were from Bergamo, the province where the late pope came from. A month later, on 5 July 201...
Time has long been a major subject of study in religion, philosophy, and science, but defining it in a manner applicable to all fields without circularity has consistently eluded scholars. Nevertheless, diverse fields such as business, industry, sports, the sciences, and the performing arts all incorporate some notion ...
Two contrasting viewpoints on time divide many prominent philosophers. One view is that time is part of the fundamental structure of the universe—a dimension independent of events, in which events occur in sequence. Sir Isaac Newton subscribed to this realist view, and hence it is sometimes referred to as Newtonian tim...
Time is one of the seven fundamental physical quantities in both the International System of Units and International System of Quantities. Time is used to define other quantities—such as velocity—so defining time in terms of such quantities would result in circularity of definition. An operational definition of time, w...
Temporal measurement has occupied scientists and technologists, and was a prime motivation in navigation and astronomy. Periodic events and periodic motion have long served as standards for units of time. Examples include the apparent motion of the sun across the sky, the phases of the moon, the swing of a pendulum, an...
Temporal measurement, chronometry, takes two distinct period forms: the calendar, a mathematical tool for organizing intervals of time, and the clock, a physical mechanism that counts the passage of time. In day-to-day life, the clock is consulted for periods less than a day whereas the calendar is consulted for period...
Artifacts from the Paleolithic suggest that the moon was used to reckon time as early as 6,000 years ago. Lunar calendars were among the first to appear, either 12 or 13 lunar months (either 354 or 384 days). Without intercalation to add days or months to some years, seasons quickly drift in a calendar based solely on ...
The most precise timekeeping device of the ancient world was the water clock, or clepsydra, one of which was found in the tomb of Egyptian pharaoh Amenhotep I (1525–1504 BC). They could be used to measure the hours even at night, but required manual upkeep to replenish the flow of water. The Ancient Greeks and the peop...
The hourglass uses the flow of sand to measure the flow of time. They were used in navigation. Ferdinand Magellan used 18 glasses on each ship for his circumnavigation of the globe (1522). Incense sticks and candles were, and are, commonly used to measure time in temples and churches across the globe. Waterclocks, and ...
The most accurate timekeeping devices are atomic clocks, which are accurate to seconds in many millions of years, and are used to calibrate other clocks and timekeeping instruments. Atomic clocks use the frequency of electronic transitions in certain atoms to measure the second. One of the most common atoms used is cae...
Greenwich Mean Time (GMT) is an older standard, adopted starting with British railways in 1847. Using telescopes instead of atomic clocks, GMT was calibrated to the mean solar time at the Royal Observatory, Greenwich in the UK. Universal Time (UT) is the modern term for the international telescope-based system, adopted...
Two distinct viewpoints on time divide many prominent philosophers. One view is that time is part of the fundamental structure of the universe, a dimension in which events occur in sequence. Sir Isaac Newton subscribed to this realist view, and hence it is sometimes referred to as Newtonian time. An opposing view is th...