Celtic twilight
noun /ˌkeltɪk ˈtwaɪlaɪt/
/ˌkeltɪk ˈtwaɪlaɪt/
[uncountable] (sometimes ironic)- the romantic and mysterious atmosphere that many people associate with the Irish people and their literature, including their belief in fairies (= small, imaginary beings with magic powers), ghosts, etc. The Celtic Twilight is the title of a collection of stories (1893) by W B Yeats.