Is there a way to import data to an iCloud calendar if you don't have a Mac?

What options exist for moving data INTO an iCloud calendar? The only options I can find for importing data involve using iCal calendars on the Mac.

I have an iPhone and an iPad and would like to manage my calendars via iCloud. I have event data (most sports team schedules and the like for my kids) which I would like to "load" rather than typing in. In the past, I always used CSV files (most of the data is distributed in Excel), ICS files, etc. and imported into Outlook. Please don't tell me to sync with Outlook as I am trying to eliminate Outlook out of the equation.

I just don't see any way to get data into an iCloud calendar other than typing it in or sync'ing with another calendar program. Am I missing something?