Yes. Black Friday is not a holiday.
In the US, the day after Thanksgiving is not a federal holiday, so the mail will still be delivered.
YES
no.
Yes, mail carriers typically work on Friday, December 24, 2010, as it is not a federal holiday. However, since Christmas Day falls on December 25, the mail service may have adjusted hours or limited delivery services on that day. It’s best to check with the local post office for specific schedules.
Yes , the USPS delivers mail on Friday : 11/29/2013 .
Yes, it is not an official holiday.
yes
yes
Yes.
In Poland there is ;)
yes none tuesday-merry christmas
Yes, it is not an official holiday.