How do I create an iCal Calendar?

To create an iCal (.ics) Calendar link, go to External ToolsiCal Calendars and click Create New iCal Link. You should then enter a name to identify such a link, for example, by the name of the person you are providing access to, and then select the security level you want (If using a 3rd party service, unless you know their IP address, select "Weak"). Upon creation a link will be provided for the .ics file which you can use to implement in your software.

For guidance on how to add an .ics file to your favourite calendar software, please refer to the relevant documentation, we do not provide support for 3rd party software.

Google Calendars: https://support.google.com/calendar/answer/37118?hl=en
iOS / iPhones: https://www.techwalla.com/articles/how-to-add-an-ics-calendar-to-iphone-ipod-touch-or-ipad
Outlook: https://www2.le.ac.uk/offices/itservices/ithelp/my-computer/programs/office/outlook/calendar/icalendar