There is a period of time in Cambridge when visitors may not enter colleges and things get a bit quiet while students prepare for exams and then take them. This is known as the Quiet Time. It lasts from mid April to mid June.

Don’t plan your visit hoping to look round a particular college as it probably wont be possible.

Noise restrictions are in place around colleges preventing playing instruments between certain times etc., and this is designed to give the college a quiet atmosphere to allow students to study in peace.

An example of a Quiet Period can be found here on the Wolfson College website: https://www.wolfson.cam.ac.uk/current-students/quiet-period