I have created a calendar named "my plan". Assume that I have input all special day to it. Then click "Calendar settings".
Click the green button "ICAL" at "Calendar Address". You can get the URL with extesion ".ics"
Write down this URL address, then what we need now is set it into your iPhone now.
Ok, tap "setting" icon at your iPhone
Choose "Mail,Contacts,Calendars".
Tap "Add Account".
Tap "Other".
Tap "Add Subscribed Calendar"
Add the URL you wrote down at the top and input it at the "server". Then here you go.