When you start Holidays Google node server for the first time, it will require to authenticate your Google account. Press Authenticate button.
Google authenitcation is not working right now so as a temporary workaround, token needs to be generated using a desktop.
Holidays Google node server accepts a list of calendars in your account to check for holidays. It will poll holidays changes every long poll (default is 60 seconds). In order for event to be considered as a holiday, it needs to be full day event AND it needs to show time as free.
Two nodes will be created for each configured calendar - today and tomorrow.
DO NOT CHANGE RELATIVE ORDER OF CONFIGURED CALENDAR NAMES. Doing this will change underlying ISY nodes to the new configuration, potentially requiring you to change ISY programs.