Japanese people do a thorough cleaning of their house and prepare traditional Japanese food for New Year's at the end of the year.
この場合、次のような言い方ができます。
ーJapanese people do a thorough cleaning of their house and prepare traditional Japanese food for New Year's at the end of the year.
「日本人は年末に大掃除をしたりおせち料理を作ります」
to do a thorough cleaning「徹底的な掃除をする」＝「大掃除をする」
to prepare traditional Japanese food for New Year's「新年のための伝統的な日本料理を作る」＝「おせち料理を作る」
at the end of the year で「年末に」
ご参考まで！
カナダ 
