Can I add a group calendar to my website?

Yes, a group calendar is a great way to share upcoming activities with viewers of your website.  The recommendation is to create a Google calendar – maintained by the group (not Web Services Made Simple).  Once the calendar is established it can be embedded in the website.  Changes to the calendar will be automatically reflected on the website.  The group contact will own the calendar and can invite other members to be able to update it.  Do an internet search on ‘Google Calendar’ to get started.