Olympics习惯上要连用定冠词,相当于the Olympic Games;用作主语时,谓语动词可用单数或复数,但在现代英语中以用复数为多见。
The Olympics is / are held every four years. 奥林匹克运动会每4年办一次。
The Olympics is / are broadcast live around the world. 运会赛事在全球各地直播。
以下截图摘自《朗文》词典:
所以,你的句子用 is scheduled 或 are scheduled 都可以。