From a press release:
“Live Nation announced today that Billy Joel will perform at Nationals Park – home of the Washington Nationals – in Washington, DC on Saturday, July 26, 2014. The performance marks Billy Joel’s first solo headlining appearance at the ballpark.
American Express® Card Members can purchase tickets before the general public beginning TUESDAY, JANUARY 28 at 10:00 AM
through FRIDAY, JANUARY 31 at 10:00 PM.
JANUARY 30 will also mark the special pre-sale period for Nationals Season Plan Holders. Tickets will be available for purchase by the general public beginning 10:00 AM on SATURDAY, FEBRUARY 1 via nationals.com/billyjoel.”