Passage: On the Eastern Shore island of Chincoteague the annual Pony Swim & Auction of feral Chincoteague ponies at the end of July is a unique local tradition expanded into a week-long carnival. The Shenandoah Apple Blossom Festival is a six-day festival held annually in Winchester that includes parades and bluegrass concerts. The Old Time Fiddlers' Convention in Galax, begun in 1935, is one of the oldest and largest such events worldwide. Two important film festivals, the Virginia Film Festival and the VCU French Film Festival, are held annually in Charlottesville and Richmond, respectively.

Question: What did the Pony Swim and Auction eventually extend to?
week-long carnival