Portal:Taiwan/Anniversaries/April/April 4
- The Combined Holidays of Women's Day and Children's Day since 2011.
- Taiwan Cat's Day
Events:
- 2005 - Taiwan Solidarity Union's newly appointed Chairman, Shu Chin-chiang, is criticized for paying his respects at Yasukuni Shrine.
Births:
- 1978 - Aska Yang (楊宗緯), Taiwanese male singer.
- 1979 - Joe Chen (陳喬恩), Taiwanese singer, actress, writer and model.
- 1982 - Ho Jing-Yang (何景揚), guitarist and lead of Taiwanese indie band Sodagreen.
- 1986 - Jolin Chien (簡宏霖), member of Taiwanese boy band 4ever.
Deaths: