Is there a word for "25 years" like "bicentennial" for 200 years? Is it "Quadranscentennial"?

I was looking for a word that means "25 years" in the way that "bicentennial" refers to 200 years.

Wikipedia suggests "Quadranscentennial", but I can't find extensive use of that.

http://en.wikipedia.org/wiki/Anniversary

Is there any word for what I'm looking for?

Solution 1:

A 25th anniversary is a silver jubilee or silver anniversary, and a celebration of that milestone would be a Silver Jubilee.

The corresponding 50th anniversary is a golden jubilee, after which usage varies; when celebrating personal achievements it is a diamond jubilee at 60 and platinum at 70, as in the reign of a monarch, but the 75th anniversary of the founding of the Boy Scouts of America, for example, was a diamond jubilee.

If you want to mark a period of time rather than the milestone, then quarter century would do the trick as well as simply saying 25th anniversary or 25 years.

Solution 2:

Note the comments entry for quadranscentennial as a term for 25th anniversary in that Wikipedia link:

Probably a modern coined term

Probably correct, in my opinion.

There are a few usages of quadranscentennial as a 25th anniversary event e.g. the Bhutan Quadranscentennial of Apollo 11 commemorative stamp issued in 1994. But I am uncertain if that was a transcription or spelling error, as I could not find any confirmation from an official Bhutan website.

For wedding commemoration, or regency, a term in current use is "Silver Anniversary". Or "Silver Jubilee" in the case of regents. It isn't a Latin-ate term. But it is a commonly understood term.

• Quadricentennial refers to the 400th anniversary of an event.