Where did the "t" come from?

Published March 27, 2012

In the most recent past, maybe the last year or so, I have noticed that more and more people are pronouncing the "t" in the word "often." I understand that English is a living language and constantly adjusts itself to the introduction of new words, like "internet" and "website," but when did it become acceptable to pronounce the "t" in "often"?