noun, noun or participle which takes 'suru', transitive verb
Formal noun and suru-verb for celebrating a happy occasion, often used in official announcements, ceremonies, or written congratulations.
新社長の就任を慶祝する会が開かれた。
A party was held to celebrate the new president's inauguration.
ご結婚を心より慶祝申し上げます。
I offer my heartfelt congratulations on your marriage.