why don't calendars scroll?

I can honestly say I taken aback by that question. They don't scroll because that's not necessarily a logical way to view a calendar?

People tend to like to view months as a single entity. If you create this really long string of days, the "one month at a time" thing kinda breaks down.

I think it might be useful to some, and certainly useful as an OPTION for how to present a calendar, but on the whole, I'd think most people like the one-month-at-a-time view.

 

They're out there

There are programs, such as Microsoft Outlook, that follow your logic. You can go to month view and just keep scrolling down forever.

I find that it's far too easy to lose track of what month or year you're on when using this approach. I much prefer iCal's approach. I always know where I'm at.