2010–2011: Debut and Everyday In July 2010, Girl's Day debuted with five members: Jihae, Jisun, Jiin, Sojin, and Minah. The first song by Girl's Day, "Tilt My Head" ("갸우뚱"), was released on July 7. Their debut EP ''Girl's Day Party #1'' was released two days after. The group followed up promotions for "Tilt My Head" with the song "How About Me" ("나어때"), for which they released a music video on July 21. Two months after the group debuted, members Jisun and Jiin left the group to pursue individual interests. Current members Yura and Hyeri were then added to the group to replace them. The new lineup's digital release ''Girl's Day Party #2'' became available on October 29. The song "Nothing Lasts Forever" ("잘해줘봐야") was used as the lead track of the digital single. In March 2011, Girl's Day digitally released ''Girl's Day Party #3'', with the single "Twinkle Twinkle" ("반짝반짝"). The song was a commercial success, ranking 4th on
Melon's digital monthly chart in April. Overall, the song ranked 39th on the service's annual chart. On May 7 the group performed in their first overseas concert held in Taiwan. The concert was organized by the
Korea Tourism Organization, and also featured performances by
U-KISS and
Super Junior M. In July, Girl's Day released a second EP titled
Everyday, with "Hug Me Once" ("한번만 안아줘") as the title track. The group released ''Girls' Day Party #4'' in September, with the track "Don't Flirt" ("너, 한눈 팔지마!"). Both releases performed well digitally, ranking in the top 50 of Melon's digital monthly chart following their release. It contained the song "Telepathy"-written and produced by Sojin-in addition to the title track "Oh! My God". On October 17, Dream T Entertainment revealed that Jihae had left the group for personal reasons. The remaining four members returned with the song "Don't Forget Me" ("나를 잊지마요") from ''Girl's Day Party #5''. In February 2013, Girl's Day released the single "White Day", followed by their first full-length album
Expectation on March 14. The album's title track, "Expectation" ("기대해"), became a commercial success and was awarded the 'Long-Run Song of the Year' award at the third
Gaon Chart K-Pop Awards and ranked 36th overall on
Melon's digital annual chart. Following
Expectation, the group released ''Girl's Day Party #6'' with "Please Tell Me" as the title track. They released "Let's Go" ("렛츠 고"), a motivational song written and composed by Sojin.
2014–2016: Everyday #3, Everyday #4, I Miss You, Love and Japanese debut On January 3, 2014, Girl's Day released their fourth EP,
Everyday 3, which was largely produced by
Duble Sidekick. The music video for the title track "Something" ("썸씽") reached over a million views within a day. It became their highest-charting single, peaking at #2 on both Billboard's
Korea K-Pop Hot 100 and the
Gaon Digital Chart. The song also ranked first on the monthly Gaon Digital Chart, and remained in the top 10 of the Korea K-Pop Hot 100 for eight weeks. Girl's Day live promotions for "Something" won five music show awards, and later won 'Best Dance Performance by a Female Group' at the 2014
Mnet Asian Music Awards. The song ranked 9th on
Melon's digital annual chart. In May 2015, Girl's Day released the single "Hello Bubble" in an endorsement with haircare brand Mise-en-scène. The group traveled to
Okinawa in June to film for the
MBC reality programme
One Fine Day. Girl's Day released their second full-length album
Love, along with its title track "Ring My Bell", in July 2015. During promotions for the album, the group faced controversy over their July 7 appearance on a Korean internet-streamed program, ChoiKoon TV. The Girl's Day members were criticized by audiences for what was seen as disrespectful behavior, and appeared on the stream the following day to offer an apology. Nevertheless, "Ring My Bell" remained in the top 10 of
Melon's monthly digital chart in July despite controversy.
2017–2019: Everyday #5 and departure from Dream T On March 2, 2017, Dream T Entertainment announced that Girl's Day was set to comeback after 21-month long hiatus during which the members focused on solo activities. The agency revealed that the group is in the process of wrapping up recording for their title track, and the comeback was set for late March 2017. On March 10, Dream T Entertainment confirmed that Girl's Day was set to make their comeback on March 27 with their new mini album. On March 17, Dream T Entertainment released the group's comeback schedule and revealed that the new album would be the fifth part of the "Everyday" series. On the day of their comeback, the official music video for "I'll Be Yours", the title track, was released simultaneously on the official Girl's Day YouTube channel and 1theK's channel; the music video on 1theK's channel surpassed 2 million views in less than 24 hours. Their new EP,
Everyday #5, debuted at No. 7 on
Billboard's World Albums chart this week. Domestically, the title track ranked 2nd on the Genie chart and 11th on the
Melon chart. In 2018, all four members were torchbearers at the
2018 Winter Olympics. On January 11, 2019, it was reported that all of the members would not re-sign with Dream T Entertainment and they would join separate agencies while not officially disbanding. ==Ambassadorship for Plan Korea==