"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~.

It charted for eight weeks and sold over 223,000 copies.

[2] All songs are written by Izumi Sakai.

This 1990s rock song-related article is a stub.