"Day by Day" is a remake song recorded by South Korean singer and Red Velvet member Joy. Originally recorded and released by female duo As One in 1999, the song was re-recorded and was released on May 31, 2021, by SM Entertainment as a track from her special remake album, Hello. Composed by Shim Sang-won and written by Yoon Sa-rah, it is an emotional medium tempo R&B ballad song. The track is about expressing courage little by little to people who have been by her side for a long time. The song debuted at position 108 on South Korea's Gaon Digital Chart and charted at position 99 on the Billboard K-Pop 100.
SM Entertainment revealed that Joy will be releasing "Day by Day" for her special album Hello at 6:00 PM of May 31, 2021. It was reported that a mood sampler, a track posters, and a teaser image for the song was released on the midnight of May 23. The track is a remake of the same name released by female duo As One in 1999.
"Day by Day" was composed by Shim Sang-won and was written by Yoon Sa-rah. Musically, it was described as an emotional medium tempo R&B ballad song. The track was noted for its "groovy" bass rhythm. The song is composed in the key of E major with a tempo of 126 beats per minute. Lyrically, it expresses one's desire to be brave and approach the people who have been around for a long time. The lyrics is described as a track with a "lyrical episode sound" as it "stimulates emotion".
On June 4, 2021, Joy performed "Day by Day" on Yoo Hee-yeol's Sketchbook. The song debuted at number 108 on the 23nd weekly issue of South Korea's Gaon Digital Chart for 2021 during the period dated May 30 â June 5. The track also debuted at position 22 and position and number 117 on the Gaon Download Chart and Gaon Streaming Chart, respectively. The song entered the Billboard K-Pop 100 at position 99 on the chart issue dated June 19, 2021.
Credits adapted from the liner notes of Hello.
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