du jour
/djuːˈʒʊə, 〈法〉 dy ʒuʀ/adjective
postpositive
- informal used to describe something that is enjoying great but probably short-lived popularity or publicity〈非正式〉热门的, 时兴的, 一时流行的：
black comedy is the genre du jour.
黑色幽默喜剧是现今时兴的艺术形式。
词源
French, literally 'of the day'.