No. On the iPad they are separate. If you are using iCloud you can see both at the same time in the Calendar app at icloud.com, but only from a computer browser.Originally Posted by Brode2
I just try and discipline myself as to where I put stuff. If it is something that must be done at a certain date or time (like a dental appointment, meeting, or birthday), then it goes in the Calendar app; because once the day/time is past it is over. If I just want a reminder on a certain date (like a book release, or a bill coming due), then I use reminders; because the actions are flexible and they won't disappear just because I missed doing it that day.
That said, there are third party apps that combine both calendar and todos. Several members like Pocket Informant. It works with the Calendar app, instead of keeping a separate calendar. Who knows, maybe they can/will do the same with Reminders eventually.