An Ordinary Day (also called Chapter 6) is the sixth album of the South Korean pop music group g.o.d.

In 2005, "An Ordinary Day" (보통날) and "Promise" (약속) were chosen as default tunes installed in LG Cyon's 340 series cellular phones.

Original composer Kwon Tae-eun rearranged the song and added a part for Yoon Kye-sang.

In 2014 HyunA's song "From When and Until When" (어디부터 어디까지), which she co-wrote with labelmate Hyunsik of BtoB, attracted attention and some controversy when listeners realized that several lines were exactly the same as the lyrics of the song "The Reason Why Opposites Attract" (반대가 끌리는 이유).

HyunA and Hyunsik later admitted that they had intentionally incorporated the lyrics as a fan homage to g.o.d's 15th anniversary reunion that year and apologized for failing to inform songwriter Park Jin-young and the g.o.d members.