According to the official Winter Weekends page on BGW's website, thirteen rides will be open, including three roller coasters and Forest of Fun. Also, there will be unique animals not normally seen at the park and a firework show on Saturdays before the park closes. The event will run from the 15th to the 24th of this month. I am attaching the link here for anyone interested in learning more about the event or getting tickets:
Special Events and Seasonal Celebrations | Busch Gardens Williamsburg
Take a look at upcoming events and things to do at Busch Gardens Williamsburg. From tasty dishes to frights and lights, we have special events and festivals throughout the year. There's a reason to visit every season with kid concerts, fireworks, Halloween haunted houses and Christmas light...
buschgardens.com