1921 nî

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Sè-kí:	19 sè-kí · 20 sè-kí · 21 sè-kí
Nî-tāi:	1900 nî-tāi 1910 nî-tāi · 1920 nî-tāi · 1930 nî-tāi 1940 nî-tāi
Nî:	1916 1917 1918 1919 1920 · 1921 nî · 1922 1923 1924 1925 1926

1921 nî sī pêng-nî.

Bo̍k-lo̍k 1 Sū-kiāⁿ 2 Bô ji̍t-kî 3 Chhut-sì 3.1 Bô ji̍t-kî 4 Kòe-sin

[siu-kái] Sū-kiāⁿ

• 7 goe̍h 23 ji̍t (kì-liām-ji̍t sī 7 goe̍h 1 ji̍t): Tiong-kok Kiōng-sán-tóng sêng-li̍p.

[siu-kái] Bô ji̍t-kî

• Albert Einstein the̍h tio̍h Nobel Bu̍t-lí-ha̍k Chióng.

[siu-kái] Chhut-sì

• 9 goe̍h 19: Paulo Freire
• 10 goe̍h 15 ji̍t: Seymour Benzer
• 11 goe̍h 12 ji̍t: Chan Chàu-châi

[siu-kái] Bô ji̍t-kî

• Chhòa Sūi-goa̍t
• Mahlon Hoagland

[siu-kái] Kòe-sin