I have created a lot of Birthday and Anniversary type of entries as
recurring, all day events in my calendar.

Unfortunately, the "show schedule as" was set to "Busy" for all those
entries and as a result my schedule seems extremely busy ;-)

How do I:

1. Search for all "All Day Events"?
2. Batch update all the results from #1 above to show schedule as "Free"?

Thanks in advance!