Here is the latest ACS message.
THE CONSULAR SECTION (AMERICAN CITIZEN SERVICES, FEDERAL BENEFITS, AND VISAS UNITS) WILL BE CLOSED ON THURSDAY, DECEMBER 24 BEGINNING AT 12:00 AND FRIDAY, DECEMBER 25
The Consular Section (Visas/American Citizen Services/Federal Benefits Unit) at the United States Embassy in Panama will be closed to the public on Thursday, December 24 beginning at 12:00 for the Christmas Eve Holiday and Friday, December 25 for Christmas Day. We apologize for any inconvenience this may cause. No routine service will be available in the Consular Section. If you are an American Citizen and have an emergency, please contact the Embassy at 317-5000 and they will put you in contact with the appropriate officer.
On Monday, December 28, 2015, the Consular Section will resume full operations with its regular schedule (please see http://panama.usembassy.gov).