Calendar in javascript/ajax, php, and mysql?

[vertrox]

I need to create a calendar which will allow people to view appointments and edit these. Am aware there are many out there put I have to create my own and it has to be my own code, so anything like jQuery is out of the question. I have studied Google Calendar and although I don't want it as advanced as this something similar should do.I have a basic idea how to do it, but I don't quite know how to get the correct days in the month etc? I was thinking about an array in php, I don't know if the php \[code\]date()\[/code\] function would help me here?Has anyone created there own or have any advice? Thanks