The U.S. embassy in Athens , the consulates general in Athens and Thessaloniki and all U.S. government offices in Greece will be closed on Monday , September 2 in observance of Labour Day , a U.S. national holiday , the embassy said .
<response> The <location>U.S.</location> embassy in <location>Athens</location> , the consulates general in <location>Athens</location> and <location>Thessaloniki</location> and all <location>U.S.</location> government offices in <location>Greece</location> will be closed on Monday , September 2 in observance of <misc>Labour Day</misc> , a <location>U.S.</location> national holiday , the embassy said . </response>