The following lists events in the year 1918 in Hungary.

Incumbents 
 King: Charles IV (until November 13/16)
 Homo regius: Archduke Joseph August (October 26 – November 16)
 President: Mihály Károlyi (until November 16)
 Prime minister: Sándor Wekerle (until 30 October), János Hadik (October 30–31), Mihály Károlyi (from October 31)
 Speaker of the House of Representatives: Károly Szász (until November 16) 
 Speaker of the House of Magnates: Endre Hadik-Barkóczy (until June 22), Gyula Wlassics (June 22 – November 16)

Events

January 

 January 5 – Lloyd George claims the dissolution of Austria-Hungary is not their war aim
 January 6 – Czech representatives of the Imperial Diet call for a unified Czechoslovakia
 January 8 – Wilson's 14 Points, demands "The people of Austria-Hungary, whose place among the nations we wish to see safeguarded and assured, should be accorded the freest opportunity to autonomous development"; Hungarian papers publish it on January 10
 January 12 – Galileo Circle is banned
 January 18–25  – General strike in Austria-Hungary
 January 19 –  89th Common Infantry Regiment mutinies

February 
 February 1–3 – Cattaro Mutiny
 February 9 – Treaty of Brest-Litovsk between Central Powers and Ukrainian People's Republic

March 

 March 3 – Treaty of Brest-Litovsk between Central Powers and Soviet Russia

April 

 April 8–10 – Congress of Oppressed Nationalities of the Austro-Hungarian Empire held in Rome

May 

 May 7 –  Treaty of Bucharest: Romania signs a separate peace with the Central Powers

June 

 June 1 – First report of Spanish flu in Budapest newspapers
 June 10 – SMS Szent István is sunk
 June 15–23 – Second Battle of the Piave River: Entente defeats Austro-Hungarian offensive in Italy
 June 29 – France recognizes Czechoslovakia

July 

 July 3 – First case of Spanish flu reported in Hungary

August 

 August 5 – Hunger riots in Cegléd, 300 women arrested
 August 9 – British foreign minister Balfour recognizes Czechoslovakia as an allied nation

September 

 September 2 – US recognizes Czechoslovakia
 September 11 – Electoral law Article XVII of 1918 (Lex Vázsonyi) gains royal ascent. The franchise is expanded from 10 to 15%.
 September 15 – Vardar offensive begins
 September 20–21 – István Tisza visits Sarajevo

October 

 October 4 –  Common Foreign Minister Burián asks for peace by Wilsonian principles
 October 5–8 –  Slovenian-Croatian-Serbian National Council established in Zagreb
 October 16
 Charles IV published the Völkermanifest
 János Lékai attempts to assassinate István Tisza
 October 17 –  Austro-Hungarian compromise abolished, István Tisza declares the war lost
 October 18 – Alexandru Vaida-Voevod's speech in front of the Hungarian Diet demands self-determination for Romanians in Hungary
 October 21 – 
 Cisleithanian Germans declare independence
 Wilson answers to Austro-Hungarian peace offer, demands the recognition of a Czechoslovak and Yugoslav state
 October 22 - István Tisza dissolves his National Party of Work
 October 24 – November 4 –  Battle of Vittorio Veneto, the Italian Front collapses
 October 23 
 The last session of Parliament before the revolution
 PM Wekerle resigns
 Hungarian National Council formed at midnight
 October 25 
 Hungarian National Council officially declared to celebration in Budapest
 Budapest Soldiers' Council is founded by Imre Csernyák
 Charles IV in Gödöllő, negotiates on the formation of a new government
 October 26 
 The Budapest press defies censorship by publishing the program of the Hungarian National Council 
 Charles IV returns to Vienna
 Refusing to nominate Károlyi, Archduke Joseph August is named Homo Regius
 Slovak National Council established
 October 27 
 Soldiers' Council negotiates with unions plotting an insurrection scheduled November 4
 Common foreign minister Gyula Andrássy sues for armistice
 October 28
 Battle of Chain Bridge
 Czechoslovakia declares independence
 Army of the Danube (AD) is separated from the Armée d'Orient advancing northwards. It is tasked to operate in Romania and the Crimea, lead by Henri Mathias Berthelot.
 October 29
 Slovak National Council declares independence in Turócszentmárton (St. Martin)
 State of Slovenes, Croats and Serbs declared in Zagreb
 Hungarian administration flees Fiume
 Charles IV appoints János Hadik as Prime Minister
 Police in Budapest defects to the National Council
 October 30
 10:00: Third Wekerle Government dissolved, János Hadik takes his oath, starts to work on assembling his government
 Protests escalate into the Aster Revolution
 Miklós Horthy ordered to hand over the Austro-Hungarian fleet
 October 31
 3:00: János Hadik resigns his office
 16:45 SMS Viribus Unitis handed over to the State of Slovenes, Croats and Serbs, dissolving the Austro-Hungarian fleet
 18:00 István Tisza assassinated

November 

 November 1
 Banat Republic declared
 West Ukrainian People's Republic declared
 Mihály Károlyi's government established
 Károlyi is relieved of his oath to Charles IV
 The government takes a new oath to the National Council
 November 2 
 Officers swear an oath to the Hungarian National Council
 Minister of Defense Béla Linder's famous line "I never want to see a soldier again!"
 Budapest Workers' Council established
 Czech forces enter Hungary at Holics (Holíč)
 November 3 – Armistice of Villa Giusti, comes into effect next day from 15:00
 November 4 – Jiu Valley National Council established in Petrozsény (Petroșani)
 November 5 –  US Foreign Minister Lansing recognizes Romanian claim to Transylvania
 November 7 
 Károlyi government begins armistice negotiations in Belgrade
 Czechs enter Nagyszombat (Trnava)
 November 8 
 Linder is replaced by Bartha as defense minister
 Deserters (mostly Romanian) besiege the Urmánczy mansion in Jósikafalva (Beliș). Nándor Urmánczy recruites a private detachment and crushes the rioters, shoots 20 prisoners
 November 9 
 Entente forces enter Novi Sad
 Székely National Council in Budapest
 Ruthenian National Council lead by Oreszt Szabó declares for Hungary
 November 10 – Romania declares war on Germany, re-entering the war a day before it ends
 November 12 
 Entente forces occupy Temesvár (Timișoara)
 Romanian invasion of Transylvania begins at Gyergyótölgyes (Tulgheș)
 Mackensen's occupying German Army begins to withdraw from Romania via Hungary, crossing into Hungary at Surduc Pass
 November 13 
 Belgrade Armistice signed
 Eckartsau Letter: Charles IV withdraws from all state affairs and recognizes Hungary's future form of government
 Oszkár Jászi negotiates with the Romanian National Council in Arad (to November 14)
 Viktor Heltai's National Guard squad is removed from Budapest to relive Czech attacks around Pozsony. Nagyszombat is recaptured.
 November 15 
 Hungarian National Defense Association (MOVE) founded
 Entente forces enter Pécs
 Hungarian counter-attacks re-capture Turócszentmárton 
 November 16 
 Both Houses of the Parliament dissolve themselves - the National Council acts as provisional legislature
 Hungary declared a republic ("First Republic"), Károlyi becomes provisional head of state
 Hungarian counter-attacks re-capture Zsolna
 November 17 
 Béla Kun returns to Hungary
 General meeting of the Székely National Council, proposal for a Székely Republic
 Franchet d'Esperey allows Romania to advance to the Belgrade Armistice line
 November 18 German-Austria declares its territorial demands for the German-inhabited areas of Pozsony, Moson, Sopron, and Vas counties; in response, Hungary decides to cease food shipments
 November 19 – Ruthenian National Council issues a memorandum to Oszkár Jászi
 November 20 – Romanian National Council in Arad demands total independence
 November 21 Austrian Foreign Minister Otto Bauer and Hungarian foreign secretary József Diner-Dénes agree to resume Hungarian food shipments in exchange for ceasing pro-Austrian agitation in Western Hungary
 November 22 – Law 41/1918 in Geman Austria re-affirms Austrian territorial claims to Western Hungary
 November 23 – No. I of 1918 People's Law expands the franchise to 50%. Universal male suffrage above 21 and female suffrage for literates above 24.
 November 24 – Hungarian Party of Communists (KMP) established
 November 25 
 Serbs of Vojvodina declares for Serbia at Novi Sad
 Fernand Vix arrives to Budapest as the head of the Budapest Allied Military Mission to oversee a French occupation of Hungary which would never be implemented
 Austrian-Hungarian trade agreement: Hungary provides cereals and animals in exchange for paper, medicine and industrial products
 November 26 - Gang leader Viktor Heltai is arrested
 November 28 - Székely and Transylvanian Hungarian National Assembly in Marosvásárhely

December 
 December 1
 A council of Transylvanian Romanians declare for Romania in Alba Iulia
 State of Slovenes, Croats and Serbs unifies with Serbia
 Székely Division established
 December 2 –  Romanians enter Marosvásárhely
 December 3 – A note by Vix demands Hungarian withdrawal from "Slovakia", but does not specify a border
 December 5–7 – Republic of Heinzenland in Burgerland
 December 6 
 Hodža-Bartha Agreement – Minister of Defense Albert Bartha and Slovak politician Milan Hodža agree on a demarcation line for Slovakia, which is rejected by Czech leaders
 Romanians enter Székelyudvarhely
 December 7 – First issue of KMP's newspaper Vörös Újság published
 December 8 –  István Apáthy named High Government Commissioner for Eastern Hungary
 December 9 –  During the assembly of the Upper Hungarian German National Council seated in Késmárk (Kežmarok), the plan for establishing an independent Spiš Republic was presented. However, the republic was never proclaimed.
 December 10 – First French troops arrive to Szeged; they are reinforced by the 157th Inf. Regiment on December 30, and the 210th Inf. Regiment on January 3, 1919
 December 11 – Slovak People's Republic declared
 December 12 – Protest by the Soldiers' Council forces defense minister Albert Bartha to resign. Minister of the Interior Tivadar Batthyány also resigns, replaced by Vince Nagy. With that, the overall balance of the Károlyi government shifts leftwards. Károlyi himself fills the defense position provisionally, alongside Vilmos Böhm.
 December 15 – Romanians cross the Belgrade armistice line
 December 16 – Mackansen arrested in Budapest
 December 17 – Czechs enter Kežmarok
 December 19 – Dissatisfied with the Hodža-Bartha Agreement, a new demarcation line is drafted by Clemenceau
 December 21 – French foreign minister Stephen Pichon approves the new demarcation line between Hungary and Czechoslovakia, forwarded to Vix
 December 22 – 
 Council of Transylvanian Hungarians in Cluj against Romanian occupation
 Sándor Juhász Nagy replaces Márton Lovászy as Minister of Religion and Education
 December 23 – A note by Vix declares the new demarcation line in Slovakia (Pichon Line)
 December 24 – Romanians enter Cluj
 December 25 – Yugoslav forces occupy Međimurje (Muraköz)
 December 27 –  Autonomous Rus'ka Krajina declared
 December 29 –  
 Czech forces enter Košice, Slovak People's Republic dissolved
 Böhm is replaced as defense minister by Sándor Festetics
 December 31 –  Berthelot-Apáthy agreement establishes a 15 km neutral zone in Transylvania, Romanians overstep it

Deaths 

 February 16 – Károly Khuen-Héderváry
 October 31 – István Tisza
 December 1 – Margit Kaffka

References

Bibliography 

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Years of the 20th century in Hungary
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