If you want to subscribe to either of the calendars, follow these directions.
Step 1 - copy the green URL that is listed as the link

Step 2 - open your preferred calendar and find 'other calendars'

If you're using Gmail, this will be a lot like the picture. Use the drop down tab next to 'other calendars'. Select 'Add by URL'.
If you're using some other calendar, look for some way to import or follow another calendar.
If you're using some other calendar, look for some way to import or follow another calendar.
Step 3 - paste the URL

Remember that URL that you copied? Paste it here from step 1.
Leave the 'Make the calendar publicly accessible?' box blank.
Choose 'Add Calendar" and you are all done.
Leave the 'Make the calendar publicly accessible?' box blank.
Choose 'Add Calendar" and you are all done.