Simple interface to Google Calendar to show and agenda-style view of multiple calendars:

And example is in dashboards.

Features are:

• Any number of subscribed Google Calendars
• All-day and timed events
• Scrolling area (that ugly scrollbar isn’t there on a mobile device)
• Configurable colors/css for each calendar and for past vs upcoming events
• Configurable update interval
• Configurable number of days forward
• Tap events to see details (end time, description, location)

Note that you need to set up your own Google Calendar API key and ClientID. Go to the Credentials Section of the Google API Console, and create an APIKEY and an OAuth Client ID for a Web Application, then ensure that the Authorised JavaScript Origins includes your HASSIO, noting that it can’t be an IP address or hostname (but note that you can use a local DNS on your homeassistant server or xip.io to make an IP address look like a hostname).

Also note that the Google Calendar API complains if it considers your web browsers is a “WebView” and will not let you authorized. If you’re using such a browser (and trust it), you’ll probably find it has the ability to use different User Agent strings. The Fully Kiosk Browser that I use for displaying this calendar needs this for example.