noun
Liberation Day
Refers to national holidays commemorating liberation from colonial rule or occupation, such as in South Korea (August 15) and Italy (April 25).
韓国では8月15日が開放記念日です。
In South Korea, August 15th is Liberation Day.
イタリアの開放記念日は4月25日です。
Italy's Liberation Day is April 25th.
独立記念日 (Independence Day) marks independence from a ruling power, while 開放記念日 (Liberation Day) specifically commemorates liberation from occupation or colonial rule.
Compound of 開放 (liberation) + 記念日 (anniversary/memorial day). The term is a direct translation of 'Liberation Day' used for various national holidays.