I used a Palm OS device for a long time. When I entered a date on the calendar, it worked well. When I began using Apples calendar on the iPhone and iPad, I noticed dates did not always display where I thought I had put them. Finally, I decided I was not the problem and I went looking for an alternative to the Apple calendar. I found Awesome Calendar (free) and decided to try it. My experience has been much better, although there is still a lot I am learning about getting around in it and making it do what I want. I do like that when I tap on a commitment for a day, all commitments for that day display in easy to read fashion. I also like that it synchronizes with my Apple calendar. It is more like the experience I had with my Palm calendar.
Stahlbrenner about Awesome Calendar Lite