liberation day

Short definition from Wiktionary

Noun

1. 1
   An annual celebration commemorating the anniversary of a nation's liberation from a regime or a foreign ruler.

Proper noun

1. 1
   A holiday celebrated in South Korea and North Korea that commemorates the restoration of Korean independence from Japanese colonial rule.
2. 2
   A holiday celebrated in various European countries to celebrate the end of Nazi rule.
3. 3
   April 2, 2025, the day when American president Donald Trump signed an executive order imposing tariffs on foreign imports into the United States.