Embed Google Calendar into Plone
Howto embed Google Calendar and the <iframe> tag into a Plone webpage
Go to the root of your plone site in the ZMI
Select "portal_transforms"
Select "safe_html"
Add a new entry to the "valid_tags" table with the attributes "iframe" and "1"
Hit Submit
Go into your Google Calendar
Click the drop down menu next to the calendar you want to embed
Scroll down to the Embed this Calendar section
Click the "Customize the color, size, and other options" link
Now you can add multiple calendars and adjust the appearance
Copy the iframe code into a Plone page
Success!
To see a working instance of Google Calendar in Plone click here

