Go to the front page Click a month on the calendar block Click manage subscriptions While doing the following, make sure that no errors are displayed and that the subscription table is aligned correctly at each step (the headings correspond to the correct columns) Add a calendar file (you can use the US-Holidays.ics file attached to the issue) Add a subscription to a calendar url with a frequency of annually. You can use webcal://www.calendarlabs.com/templates/ical/US-Holidays.ics Ensure the created subscription has the correct frequency Change the subscription's update frequency Ensure that subscription frequency is updated correctly Remove the subscription Remove the file