To export the calendar to a third-party calendar application, you need to be on the Programming page/screen. The ‘Subscribe to Calendar’ function/button is at the base of the ‘Units’ list. Click on the button, and then copy the relevant link.
On a computer, this can be found on the left-hand side of the main programming screen.
On a mobile device, you will need to click on the calendar with the ‘+’ sign, and then scroll to the base of the Units list.