I want to create an iCal Calendar that can be downloaded from my website to the users Calendar program or imported to Google Calendar. What I want to know is if I do a direct Export from iCal on Mac OS X is that the file that I upload to my server? Any catches or caveats I should be aware of? Or is there a better way?
I find the following link quite useful
http://blog.hubspot.com/marketing/calendar-invites-ical-outlook-google
There is also this tool you can use. It supports multi-events .ics file creation. It also supports timezone as well.
That will work just fine. You can export an entire calendar with File > Export…, or individual events by dragging them to the Finder.
iCalendar (.ics) files are human-readable, so you can always pop it open in a text editor to make sure no private events made it in there. They consist of nested sections with start with BEGIN: and end with END:. You'll mostly find VEVENT sections (each of which represents an event) and VTIMEZONE sections, each of which represents a time zone that's referenced from one or more events.
Simple use this great free online tool:
Source: Stackoverflow.com