What happened to Ascension Thursday?

It is true that the Ascension took place 40 days after Easter Sunday, but as the Catholic Church has to live in a society where it is difficult to have a free day on a Thursday, the Bishops decided to move it to the closest Sunday, in order to easily permit that all the faithful can participate and live that important mystery of our faith.

Repsonse given by Fr. Félix López, SHM