Unable to answer "What are the opening hours of Nicholson Museum (Museum)?" for https://osm.org/node/1170946760 via StreetComplete 31.1:

The Nicholson Museum has closed and is now part of the Chau Chak Wing Museum, with a different location on campus.

Attached photo(s):
https://westnordost.de/p/34980.jpg
https://westnordost.de/p/34981.jpg