| Good Day | |
| Cover: | Good Day Zard Single.jpg |
| Type: | single |
| Artist: | Zard |
| Album: | Eien |
| Released: | December 2, 1998 |
| Genre: | |
| Label: | B-Gram |
| Producer: | Daiko Nagato |
| Prev Title: | Atarashii Door ~Fuyu no Himawari~ |
| Prev Year: | 1998 |
| Next Title: | Mind Games |
| Next Year: | 1999 |
"Good Day" is the 27th single by Zard[1] and released on December 2, 1998 under B-Gram Records label. It was released on same day as previous 26th single, Atarashii Door ~Fuyu no Himawari~. The single debuted at #2 on the first week. It charted for eight weeks and sold over 223,000 copies.[2]
All songs are written by Izumi Sakai.