If you celebrate an occasion or if you celebrate, you do something enjoyable because of a special occasion or to mark someone's success. 庆祝
verb [vt. 及物动词]庆祝,庆贺;赞扬,赞美;主持(宗教仪式)
If an organization or country is celebrating an anniversary, it has existed for that length of time and is doing something special because of it. 庆祝 (周年纪念日)
celebrate
“ -ate” ⌜ 表示使成为或具有某种特性的 - indicating to make or become ~ ⌟