AD 1921 in Taiwan is ...

Minguo 10

AD 1921 is also...

Tongzhi 60

Guangxu 47

Xuantong 13

Minguo 10

"The Republic of China calendar (Chinese: 中華民國曆) or Minguo calendar (Chinese: 民國紀年) is the official calendar used in Taiwan since 1945, and also adopted by Overseas Chinese and Taiwanese communities." -Wikipedia

Age Lookup

Year	Local year	Age	Ganzhi	Zodiac
1918	Minguo 7	108	wu wu	Horse
1919	Minguo 8	107	ji wei	Goat
1920	Minguo 9	106	geng shen	Monkey
1921	Minguo 10	105	xin you	Rooster
1922	Minguo 11	104	ren shu	Dog
1923	Minguo 12	103	gui hai	Pig
1924	Minguo 13	102	jia tse	Rat