The orchestra celebrates this event twice a year.

The orchestra is, on the one hand, celebrating its 25th anniversary.

For the annual three-week winter festival, the orchestra will celebrate Mozart on his 250th birthday.

The orchestra is celebrating its 75th anniversary this season, and that would normally have been good reason for it to call attention to itself.

In 2008, both orchestras celebrated 60 years in existence.

Also in 2008 the orchestra celebrated its 80th Anniversary.

Some orchestras even celebrate their peripatetic conductors' popularity with other employers.

The orchestra celebrated its 60th birthday in 2004.

But even as the orchestra celebrated its gift, it was clear that all was not well.

The orchestra celebrates its 20th anniversary in 2011.