Location: Trust me you've never heard of it..., United States
If we want Christmas photos of the Luxembourg royals we need to look for pictures from December 6th each year. Holidays are different in each country and St. Nikolaus day which is when the real Christmas type celebrations happen in Luxembourg. They attend concerts, auction Christmas trees, attend mass and spend time with families on December 24/25 but in Luxembourg it is not what we in various other countries consider to be "Christmas" celebrations.
The Paris attacks and also (interestingly IMO how they spoke to their children about staying safe)
The Refugee crisis in Europe
Luxembourg's Presidency of the EU
The Paris Climate Change Summit
The Grand Duke 95th birthday - apparently Grand Duke Jean is doing "extremely well"