Mark this date - always on time
Ever wondered about the Indonesian bank holidays? The 2007 Formula Nippon Championship Schedule? All can be found MarkThisDate. MarkThisDate offers iCalendar files that can be included in your own calendar software. I’ve seen more sites that offer these files, yet MarkThisDate seems to be most complete. Close to every country in the world is represented with usually at least the bank holidays.
You can add your own files, which might mean that you will find buggy or incomplete feeds, yet the amount of downloads that is shown and the ability to write reviews regarding the feed in question should give you an impression about how trustworthy the source is.
Probably the best thing is the direct links to integrate these feeds into your favorite calendar software, be it 30Boxes, Google Calendar, Netvibes, Outlook, Zimbra, My! Yahoo etc.