Thanks for the info. Among the many steps provided, what did the trick was item 4:
Change the Sync settings for your calendars:
- Tap Settings > Mail, Contacts, Calendars.
- Scroll down to the bottom.
- Tap Calendars > Sync.
- If sync is set to All Events, set it to a specific duration, such as Events 1 Month Back. If it's set to a specific duration, set to All Events.
IOS just would not update icloud for calendar if it's set to All Events. As soon as I changed the setting on my iphone for Calendar to Events 6 Months Back, the synchronization worked flawlessly.
Thanks again. /Kenny