Translink is operating a special timetable over Christmas and New Year, from December 24 to January 2.
Full details can be found at www.translink.co.uk/christmas2014.
No Ulsterbus, Metro, Goldline, Airport Express, NI Railways or Enterprise services will operate on Christmas Day.
There will be some limited Goldline, Metro and Ulsterbus services operating on Boxing Day, including Goldline Express X1 from Belfast to Dublin serving Dublin Airport and Service 300 to International Airport.
Special holiday timetables will operate on many services between December 27 and January 3, 2015.