Tim Purves,
1. Well if you have the month and date, you can temporarily set the date as
an all-day event using this year.
In Outlook> Select Calendar> Select the date for this year> Fill in the
information for the event> Then under the Recurrence tab> Set it to show
every year. Then save it.
2. When you finally get the year. Find the entry on our calendar, Right
click the event>Select Open Series...> Adjust the date to show the correct
year> Check under the Recurrence tab, and make sure date is set to show
every year> then save and close the event> Check through a couple of years,
making sure their are no duplicates.

Does anyone have any help with this?  There must be a way.  What do others
do if they don't know the start date?