The following lists events in the year 1921 in Hungary.
Incumbents
Regent: Miklós Horthy
Prime Minister: Pál Teleki (to 14 April), István Bethlen (from 14 April) Speaker of the National Assembly: István Rakovszky (to 30 July), Gaszton Gaál (from 12 August)
Events
March
14 March - Act III of 1921 passes the National Assembly. The so-called "order law" invests powers in the government to protect the social order against communists and other radicals 27 March - Easter Crisis: Charles IV returns to Hungary at Szombathely 28 March - Easter Crisis: Charles IV negotiates with Horthy in Budapest. Horthy refuses to resign power. Charles IV returns to Szombathely.
April
1 April - Easter Crisis: People's Assembly supports Horthy against Charles IV
5 April - Easter Crisis: Charles IV leaves Hungary
6 April - Act III of 1921 comes into effect
14 April - István Bethlen replaces Pál Teleki in government
23 April - Romania signs alliance with Czechoslovakia
May
4 May - Land swap agreement between Romania and Czechoslovakia
June
7 June - Romania signs alliance with Kingdom of Serbs, Croats and Slovenes
August
6 August - Inter-Allied General Committee publishes the plan for the transfer of Burgerland from Hungary to Austria in 3 stages (A, B and C Zone). 9-10 August - Pact between Czechoslovakia and Austria. Czechoslovakia would support Austrian territorial claims and LoN loan, Austria denounces Habsburg restoration attempts. 14 August - Serbian–Hungarian Baranya–Baja Republic declared 21 August - Serbian–Hungarian Baranya–Baja Republic dissolved 22 August - Hungarian forces enter Pécs 26 August - Scheduled date of evacuation of Zone A, delayed by 48 hours 27-28 August - Uprising in West Hungary begins
September
7-8 September - Second Battle of Ágfalva
15 September - Italian foreign minister Pietro Tomasi Della Torretta begins to mediate between Austria and Hungary 16 September - Prónay briefly arrests Antal Lehár 23 September - Entente demands Hungary evacuate Zone B and C 29 September - Gyula Gömbös writes to Prónay, asking him to take control of Zone B and C after Hungarian evacuation. Ludwig III of Bavaria arrives to Sárvár where he spends his last weeks
October
3 October - Hungarian forces leave Zone B and C. 4 October - Pál Prónay declares the independent state of Lajtabánság in Burgerland 7 October - Austro-Hungarian negotiations begin in Venice with Italian mediation 13 October - Venice Agreement between Hungary and Austria 17-18 October - Legitimists plot a coup against Horthy in west Hungary 20 October - Charles IV returns to Hungary for the second time via airplane landing at Dénesfa at the Cziráky estates 22 October - 04:30 - Telegraph notifies the Government about Charles IV's return 23-24 October - Battle of Budaörs, Charles IV halted before entering Budapest 24 October - Czechoslovakia and Kingdom of Serbs, Croats and Slovenes issue an ultimatum to Hungary to resist and overthrow the Habsburgs, threaten military intervention. 25 October - II. Army of Lajtabánság under Miklós Budaházy enters the Sopron plebiscite zone with 400 men and overthrows the legitimist government. 27 October - 6/II Infantry Battalion replaces paramilitaries in Sopron 31 October - Prónay and his officers summoned to Horthy in person, ordered the evacuation of Lajtabánság by 5 November
November
1 November - Charles IV leaves Hungary for the last time
5 November - Rongyos Gárda leaves Burgerland, Lajtabánság dissolved
6 November - The People's Assembly dethrones the House of Habsburg-Lorraine (1921:XLVII Act) 11 November - Inter-Allied General Committee, after notified by Hungary that the paramilitaries were evacuated, orders Austria to take control of Burgerland, except for the Sopron plebiscite zone. 13-15 November - Austria takes over North Burgerland (north of Sopron) 19 November - Charles IV arrives to Madeira 25-29 November - Austria takes over Central and South Burgerland (south of Sopron)
December
2 December - Austrian, Hungarian and Entente authorities sign a protocol on the completed handover of Burgerland. 14-16 December - Sopron Plebiscite: Sopron votes to stay in Hungary 15-16 December - Czechoslovakia and Austria sign a pact of friendship and co-operation 20 December - Council of Ambassadors accepts the result of the plebiscite 22 December - Bethlen-Peyer Pact between the Bethlen Government and the Social Democratic Party 1921:LIII. Act, establishment of levente organisations 23 December - Amnesty for political prisoners sentenced below 5 years