"Good Day" (Korean: 좋은 날;RR: joheun nal) is a song recorded in two languages (Korean andJapanese) by South Korean singerIU. The Korean version was released on December 9, 2010, as the lead single for IU's third extended play (EP)Real. It was written byKim Eana, while production was handled by Lee Min-soo. The Japanese version was originally included on IU's first Japanese extended playI□U, released on December 14, 2011, before being released on March 21, 2012, as IU's first single albumGood Day.
"Good Day" received generally positive reviews by music critics.Billboard magazine crowned it as the best K-pop song released in the 2010s. Commercially, the song debuted atop theGaon Digital Chart, topping the chart for five weeks and becoming thesixth best-selling single in South Korea, selling more than 4.4 million digital units. The Japanese version reached the top five on theOricon Singles Chart, and sold more than 30,000 physical copies in the country.
"Good Day" was released on December 9, 2010, simultaneously with the singer's third extended play (EP)Real. On November 15, 2011, Loen announced, that IU was signed toEMI Music Japan and was set to release an extended play with her greatest hits recorded in Japanese, on December 14, 2011, titledI□U.[1]
The Korean version of "Good Day" was written byKim Eana, while production was handled by Lee Min-soo. In terms ofmusical notation, the song is composed in thekey ofA♭ major, with a tempo of 128beats per minute, and runs for 3 minutes and 53 seconds.[2]
Writing forNew Straits Times, Bibi Nurshuhada Ramli described "Good Day" as IU's breakout song.[3]South China Morning Post's Sylvia Issa described the songs as a "unique musical phenomenon".[4] In November 2019,Billboard magazine compiled a list of the 100 Greatest K-Pop Songs of the 2010s, with the single "Good Day" ranking at number one.[5]
Commercially, "Good Day" debuted at number one of theSouth Korean singles chart on the 51st issued week of 2010.[6] It topped the chart for five consecutive weeks, falling to no. four on the fourth issued week in 2011. The song held the record for the most weeks at number one until 2018, when it was beaten byiKon "Love Scenario". Furthermore, the single topped the monthly singles chart in December 2010.[7] It was selected asGallup Korea's Song of the Year in 2011.[8]
^韓国の“国民の妹”IU、来春日本デビュー決定 [Korea's "Nation's little sister" IU to debut in Japan spring next year].Oricon News (in Japanese).Archived from the original on June 25, 2018. RetrievedAugust 12, 2020.
^"IU – Good Day". Musicstax.Archived from the original on October 18, 2020. RetrievedAugust 12, 2020.
^Nurshuhada Ramli, Bibi (December 29, 2019)."#Showbiz: Big love for IU on every note".New Straits Times. New Straits Times Press.Archived from the original on December 30, 2019. RetrievedJanuary 26, 2020.
^ab2010년 51주차 Digital Chart [Week 51 of 2010 Digital Chart].Gaon Music Chart (in Korean). Korea Music Content Association.Archived from the original on March 7, 2015. RetrievedJuly 2, 2019.
^2010년 12월 Digital Chart [December 2010 Digital Chart].Gaon Music Chart (in Korean). Korea Music Content Association.Archived from the original on November 26, 2020. RetrievedJanuary 26, 2020.
^"대중음악계 10년史..최고 히트곡 톱10·연도별 190選" [10 years of popular music .. Top 10 hits, 190 songs by year].Star News (in Korean). September 15, 2014. RetrievedOctober 2, 2021.
^아이유, 한국대중음악상 3관왕…시상식 불참 ‘아쉬워’ [IU, Korea pop the Triple Crown ... Attendance at the awards ceremony].Segye (in Korean). February 29, 2012.Archived from the original on January 12, 2021. RetrievedJanuary 26, 2020 – viaNaver.
^週間 シングルランキング: 2012年04月02日付 [Weekly Singles Ranking] (in Japanese). Oricon. April 2, 2012.Archived from the original on January 26, 2020. RetrievedJanuary 26, 2020.
^2011년 Digital Chart [2011 Digital Chart].Gaon Music Chart (in Korean). Korea Music Content Association.Archived from the original on September 24, 2015. RetrievedJanuary 26, 2020.
Gaon Download Chart 2010년 [Gaon Download Chart 2010].Gaon Music Chart (in Korean). Korea Music Content Association. Archived fromthe original on October 18, 2013. RetrievedMarch 28, 2015.
2011년 Download Chart [2011 Download Chart].Gaon Music Chart (in Korean). Korea Music Content Association.Archived from the original on April 2, 2015. RetrievedMarch 28, 2015.
2012년 Download Chart [2012 Download Chart].Gaon Music Chart (in Korean). Korea Music Content Association. p. 4. Archived fromthe original on August 15, 2016. RetrievedDecember 19, 2016.
Gaon Download Chart 2013년 12월 1주차 [Gaon Download Chart Week 1 of December in 2013].Gaon Music Chart (in Korean). Korea Music Content Association. Archived fromthe original on December 20, 2013. RetrievedApril 17, 2015.
Gaon Download Chart 2013년 12월 2주차 [Gaon Download Chart Week 2 of December in 2013].Gaon Music Chart (in Korean). Korea Music Content Association. Archived fromthe original on February 22, 2014. RetrievedApril 17, 2015.
2014년 Download Chart [2014 Download Chart].Gaon Music Chart (in Korean). Korea Music Content Association. p. 4. Archived fromthe original on August 15, 2016. RetrievedDecember 19, 2016.
2015년 Download Chart [2015 Download Chart].Gaon Music Chart (in Korean). Korea Music Content Association. p. 3. Archived fromthe original on August 15, 2016. RetrievedDecember 19, 2016.
^オリコンランキング情報サービス「you大樹」 [Oricon Ranking Information Service 'You Big Tree'].Oricon (in Japanese).Archived from the original on December 2, 2018. RetrievedJanuary 15, 2014.
^정재형, 아이유 '좋은 날' MV 카메오 출연 '화제' [Jung Jae-hyung makes a cameo in IU's 'Good Day' MV as an agent].Asiae (in Korean). Asian Economy. December 8, 2010.Archived from the original on July 13, 2019. RetrievedJuly 13, 2019.
^Japan debut single 『Good Day』(初回生産限定盤)(Type A)(DVD付) [Japan debut single [Good Day] (First Press Limited Edition Type A) (with DVD)] (in Japanese). EMI Records Japan. March 21, 2012.Archived from the original on May 11, 2021. RetrievedJuly 13, 2019 – via Amazon.
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