Christmas on the International Space Station

The Russian Orthodox Church celebrates Christmas according to the Julian calendar, whilst the Catholic Church and the various Protestant denominations use the Gregorian calendar so the crew may celebrate Christmas more than once on the station choosing between 25 December or 6, 7 or 19 January.

[2] Other celebrations included Expedition 30, with the arrival of Donald Pettit, Oleg Kononenko, and André Kuipers.

[6] This included Dan Burbank, Oleg Kononenko, Don Pettit, Anatoly Ivanishin, Andre Kuipers, and Anton Shkaplerov.

[6] On 24 December 2013, astronauts made a rare Christmas Eve extravehicular activity, installing a new ammonia pump for the station's cooling system.

The faulty cooling system had failed earlier in the month, halting many of the station's science experiments.