Editing 1921 (section)

=== December ===
{{Main|December 1921}}
{{unreferenced section|date=May 2025}}
* [[December 1]] &ndash; Rising prices cause riots in [[Vienna]].
* [[December 6]]
** The [[Anglo-Irish Treaty]] establishing the [[Irish Free State]], an independent nation incorporating 26 of Ireland's 32 counties, is signed in London.
** [[Agnes Macphail]] becomes the first woman to be elected to the Canadian Parliament.
* [[December 13]] &ndash; In the [[Four-Power Treaty]] on Insular Possessions, the [[Empire of Japan]], United States, United Kingdom, and [[French Third Republic]] agree to recognize the status quo in the Pacific.
* [[December 23]] &ndash; [[Visva-Bharati College]] is founded by [[Rabindranath Tagore]] in [[Santiniketan]], [[Bengal Presidency]], [[British India]].
* [[December 29]] &ndash; [[William Lyon Mackenzie King]] becomes Canada's tenth [[Prime Minister of Canada|prime minister]]; he will serve for three non-consecutive terms until 1948.