Use the link for google calendar's to put in your time preference: http://www.google.com/calendar/embed?src=shadowtemplars%40gmail.com
Everyone can view the calendar events but you must have a gmail account to edit the calendar events.
PS. we have found that to edit the Shadow Templar calendar you must do so from your own google calendar.
Update (Nymeria): we created a gmail account for our guild. The username is shadowtemplars. Please send an email to email@example.com for the password. That way we all can directly access/modify the calendar and post in this blog. Just try to identify yourself to avoid confusion.