AD 1931 in Taiwan is ...

Minguo 20

AD 1931 is also...

Tongzhi 70

Guangxu 57

Xuantong 23

Minguo 20

"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
1928	Minguo 17	96	wu zhen	Dragon
1929	Minguo 18	95	ji si	Snake
1930	Minguo 19	94	geng wu	Horse
1931	Minguo 20	93	xin wei	Goat
1932	Minguo 21	92	ren shen	Monkey
1933	Minguo 22	91	gui you	Rooster
1934	Minguo 23	90	jia shu	Dog