National Foundation Day; a public holiday commemorating the founding of the nation. In Japan it is observed on February 11.
建国記念日は学校や多くの会社が休みになる。
On National Foundation Day, schools and many companies are closed.
毎年建国記念日に式典が行われ、国旗が掲げられることが多い。
Ceremonies are often held and the national flag is raised annually on National Foundation Day.
旅行の計画は建国記念日を避けて立てた方がいいかもしれない。
You might want to avoid planning travel on National Foundation Day.