iPhone calendars not showing up in icloud

My iphone calendars are not showing up in iCloud. All of my calendar data is on my iPhone. I have turned on iCloud on my phone and checked "Calendar." I am using the same Apple ID on my phone as I am using for iCloud. I can see how to add calendars on the iCloud service, but if I add a calendar in iCloud with the same calendar name as the calendars that are on my iphone ,they are not showing up on iCloud. "Push" is turned to on but I can see that is pushing from the server to my iPhone and not from my iPhone to the iCloud. What could I be doing wrong?