iCal lost appointment / Time Machine retrieval

I have a recurring appt that occurs on January 1 every year. Yesterday I discovered that the occurrences prior to 2014 have disappeared. This is distressing as I have pertient info saved on those entries. All other appointments in all calendars seem to be present going years back, so it is only this one (or a select few) that have disappeared.

I have tried to retrieve by restoring by Calendar folder in Library from my oldest Time Machine backup, which was last September 2013. But this is not working. I go through the process, but none of the data loads... I only get three default calendars, Birthdays, Home, and Work (i think) but no data present.

What am I doing wrong in restoring this from Time Machine?

(to confirm, here are steps:

1. I am turning off wifi and my iphone

2. Enter time machine

3. Restore Calendar folder

4. Exiting TM and REPLACE calendar folder with old one

5. Also tried restoring the iCal files in Preferences, but this didn't help either.)

Thanks.