[O] Yearly repeats on the agenda

[SW]

I have entries such as the following:

*** <2011-01-01 +1y> New Year's Day        :holiday:

which appear on the agenda on the correct day each year, but they appear as:

File:  <2011-01-01 +1y> Public Holiday: Freedom Day             :holiday:

with the date showing. Other deadline/schedule/plain timestamp entries do not
show the full date. Which variable controls this?