How do I export events entered in the calendar function to Outlook?

You need to click on the link Download a calendar event.

Jobaffinity.co.uk will then send you an .ics document (ical format). Depending on your workstation configuration, this document may be opened automatically, or you may need to open it explicitly by double-clicking on it from your download folder. This should send Event to your default calendar software. Your default calendar setting depends on your desktop configuration and is not related to the software.