AD 1991 in Taiwan is ...

Minguo 80

AD 1991 is also...

Tongzhi 130

Guangxu 117

Xuantong 83

Minguo 80

"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
1988	Minguo 77	36	wu zhen	Dragon
1989	Minguo 78	35	ji si	Snake
1990	Minguo 79	34	geng wu	Horse
1991	Minguo 80	33	xin wei	Goat
1992	Minguo 81	32	ren shen	Monkey
1993	Minguo 82	31	gui you	Rooster
1994	Minguo 83	30	jia shu	Dog