During Sydney's New Year's Eve fireworks, which famous harbor bridge is illuminated alongside the Opera House?

During Sydney's New Year's Eve fireworks, the famous harbor bridge illuminated alongside the Opera House is Sydney Harbour Bridge.

Sydney’s celebration is staged around the harbor, with fireworks launched from barges, buildings, and the bridge. The Sydney Opera House and Sydney Harbour Bridge form the event’s instantly recognizable visual setting, linking a major civic festival with two landmark structures.

The bridge is a steel through arch bridge that opened in 1932. It carries road and rail traffic between Sydney’s central business district and the North Shore, while its broad arch provides a dramatic frame for fireworks and lighting effects.

The celebration is often among the first major international New Year’s Eve broadcasts because Australia reaches midnight earlier than many heavily populated parts of the world. The Opera House is part of the backdrop, but the bridge named in the answer is the structure commonly used for the pyrotechnic display.