The Russian Embassy in Washington DC will be closed on Dec 25th reopening for normal operations on Dec 28th. They will close again on Jan 1st - Jan 8th reopening on Jan 11th.

New York - Russian Consulate will be open on Dec 25th reopening on Dec 28th. They will close on Dec 30th - Jan 8th reopening on Jan 11th.
San Francisco - Russian Consulate will be closed on Dec 25th reopening on Dec 28th. They will close again on Jan 1st - Jan 8th reopening on Jan 11th.
Houston - Russian Consulate will be closed on Dec 25th and 28th reopening on Dec 29th. They will close again on Jan 1st - Jan 8th reopening on Jan 11th.
Seattle - Russian Consulate will be closed on Dec 25th reopening on Dec 28th. They will close again on Jan 1st - Jan 8th reopening on Jan 11th.