Celtic Oyster Festival The annual Celtic Oyster Festival returns to Willow Glen Park this Saturday. Konopelski Katering will be serving some Emerald Isle favorites all day, including oysters and clams on the half shell, bangers and mash, Guiness dip beef sandwiches, fried oyster sandwiches and more. In addition, festival-goers can browse through Celtic craft and gift stands and enjoy live entertainment throughout the day. The festival runs from 12 noon to 9 p.m. Admission is $10 per person. Breakfast Buffet at Joanna Furnace The Hay Creek Valley Historical Association is serving a breakfast buffet this Saturday at Joanna Furnace. The homemade buffet includes sausage, bacon, scrapple, cream chipped beef, pancakes, French toast, scrambled eggs, fruit, toast and beverages. A flea market and tours of the historic property are also part of the day. The event runs from 7 to 11 a.m. Admission is $9.00 for adults and $4.50 for children ages 5 to 11. Kids 5 and under are free. Antietam Valley Street Fair The Antietam Valley community is coming together this Saturday for the annual Street Fair. The fair is held on Friedensburg Road between Bixler's Lodge and the Lower Alsace Township Building. Be sure to stop by the "Pork for the Park" contest area. For a $10 donation, you can sample pulled pork from participating vendors and vote for the winner of the Pig Trophy. The donation is toward improvements at Carsonia Park. The festival runs from 11 a.m. to 4 p.m. and includes more than 50 vendors, music and pony rides for the kids.