Cardinal Walter Kasper of Germany, the President Emeritus of the Pontifical Council for Promoting Christian Unity turns 80 today, Tuesday, 5 March 2013. As such, normally he would have lost his voting rights in a Conclave as a Cardinal-elector.

http://www.gcatholic.org/hierarchy/data/cardJP2-8.htm#76

However, as the rights of a Cardinal-elector is such that as long as he has not yet turned 80 at the moment when the Apostolic See (the Papacy) becomes vacant (Thursday, 28 February 2013), the Cardinal will still be an elector in the conclave that elects the next Pope. Therefore, Walter Kasper will still be an elector in the upcoming conclave, and thus, also the oldest of the Cardinal-electors to enter the Sistine Chapel in a week’s time.

Ad multos annos, Your Eminence! and we will always pray for you and for your brother Cardinals, especially the electors of our next Pope!