Several artists call their band Halcyon Days.

(#1) Based out of Oslo, Norway, Halcyon Days are a hard-hitting melodic metal band.
Since their beginning in 2012, they have released two EP’s, and two albums.
Their debut album .ELEVATE was frequently playlisted and recommended on Norway’s national radio, NRK P3. Two years after their debut album, they released their self-titled EP Halcyon Days in 2016, scoring more than 350k total streams on digital platforms.
The EP was met with an amazing response worldwide, putting the band on the map outside of Norway. The band signed with Indie Recordings and released their second full-length album, with the title Rain Soaked Pavements & Fresh Cut Grass June 15 2018. Metal Trenches (US) stated that the album is “one of the better metalcore releases of the year”, while PureGrainAudio (CAN) defined it as “a superb example of melodic metal/hardcore.”
The release hit 1 Million streams on Spotify and landed the band their first big shows outside of Norway at festivals like Summer Breeze Open Air, Reeperbahn Festival and High Five Summerfest. The band have been working with legendary names in Metal as Daniel Bergstrand, Fredrik Thordendal and Henrik Udd for their upcoming third full-length album due fall 2021 via Indie Recordings

(#2) Halcyon Days were a 4-piece rock band from Belfast. Bursting out of the ceasefires of the late 1990s they recorded and released two albums – Sometimes (1996) and Alkaline Times (1997). They toured extensively throughout the UK, Ireland, Western Europe and Scandinavia cultivating an extensive fanbase and an anthology of subtle yet energetic rock songs.

(#3) Halcyon Days plays melodic and upbeat folk music. They come from Europe's very heart, and sing in French and English! Halcyon Days means wonderful guitar chords accompanied by breathtaking melodies on the accordion. The band toured alot between 1991 and 1996 and have separated in the meanwhile. They have produced one self-titled album (1994). An acoustic side project, also called Halcyon Days, is touring through local bars and wineries at the moment.

(#4) Halcyon Days is also the name of a short lived gothic metal band from Oakland, California. Sound samples can be found on myspace.com/halcyondays1

(#5) Halcyon Days are a four-piece rock and roll band from Keighley, West Yorkshire, which formed in its present incarnation in 2011. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.