さいじつ祭日saijitsu
1.

A designated day for conducting ceremonies and rituals at shrines and temples, often linked to traditional beliefs or cultural celebrations.

2.

A day set aside to honor and commemorate the spirits of deceased individuals, typically observed within the Shinto belief system.

3.

A holiday recognized by the government, during which various celebrations or observances related to the imperial family may take place.

4.

An informal term for public holidays that often include a break from work or school activities.

Example:

今度の祭日は日曜日と重なります。