Wiktionary
sundown syndrome
n. (alternative form of sundowner syndrome English)
Wikipedia
Sundown Syndrome
"Sundown Syndrome" is a song by Tame Impala, released as a single in 2009. It was the band's first official single release. Its B-side was a cover of the Blue Boy song " Remember Me". The title "Sundown Syndrome" refers to a psychological phenomenon called Sundowning.