Step 1:

Open Settings and go to Calendar

Step 2:

Click on Accounts

Step 3:

Click on Add Account

Step 4:

Go to Other

Step 5:

Press Add Subscribed Calendar

Step 6:

Enter the following URL:

tanzquotient.org/en/events/calendar.ics

Step 7:

With the Description field you can choose a name for the calendar.

The other fields can be left blank.

Press Save to complete the setup.