The office will be open till December 22.
The office will be closed from December 23 to December 27th.
It will reopen December 28th and 29th.
The office will be closed from December 30th to January 3rd.
It will reopen on the 4th of January 2017.
The office will be closed January 5th till the 8th and will resume normal working hours on January 9th 2017.