Subject + 庆祝 + Event/Occasion
庆祝 (qìngzhù) means "to celebrate" and is used for holidays, achievements, or special occasions. It can also function as a noun meaning "celebration." For example, 庆祝生日 means "to celebrate a birthday."
我们全家一起庆祝了奶奶的八十大寿。
wǒmen quánjiā yìqǐ qìngzhù le nǎinai de bāshí dàshòu.
Our whole family celebrated Grandma's eightieth birthday together.
公司举办了一场晚会来庆祝成立十周年。
gōngsī jǔbàn le yì chǎng wǎnhuì lái qìngzhù chénglì shí zhōunián.
The company held a gala to celebrate its tenth anniversary.
朋友们聚在一起庆祝他找到了新工作。
péngyǒumen jù zài yìqǐ qìngzhù tā zhǎodào le xīn gōngzuò.
Friends gathered together to celebrate his finding a new job.