I know you asked for a calendar that doesn't have a database backend, but this one at codewalkers.com was my choice when I was looking for a plug and chug script. If you can get someone to install PHP/mySQL for you, then this script is pretty easy to install and use. I use it on one of my sites and the secretary who updates the calendar loves it. The URL is calendar.codewalkers.com. I thought it was easy to customize, but it also worked for me "right out of the box" so to speak.