JavaScript
Events calendars and some image carousels on the Museum of London website use a computer language called JavaScript.
In the past, JavaScript could have been used for dubious purposes. Naturally the Museum is not using it in this way, but some computers - especially those on office networks - have JavaScript turned off as a security measure.
Unfortunately, this means the events calendar or image carousels will not work on such computers. However, you can still search for events on the events listing pages using the ‘back’ arrow icon and ‘forward’ arrow icon to select the desired date.