How to rename calendars on iPad

It is really annoying to see three identical names, "Calendar" on my iPad. But I can't find a menu option that allow me to rename it. How can I rename calendars on the iPad?You can't change the names of calendars on the iPad. You must change the names in whatever application the calendars are synced from iCal for the Mac OS, or Outlook on the Windows. I have calendars with different names in iCal