solo se puede decir buenos dias, buenas tardes y buenas noches, good evening = buenas tardes

There is no word for evening in Spanish. So, depending on the hour you can translate it for: ¡Buenas tardes! (=Good afternoon) (Until 8 p.m. or so) or for: ¡Buenas noches! (=Good night) (From 8-9 p.m. on) Regards.

Buenos tardes! a_a