Tradice koled pochází ze středověku - www.lidovky.cz
V dnešní době jsou koledy synonymem pro vánoční písně. Ve středověku tomu tak nebylo.

Koledy (Carols) are as indispensable for a Czech Christmas as carp and Christmas trees. In fact, they have a long history, going all the way to +šth century. Originally, they were associated with small gifts from householders to roving singers (trick-or-treat - Czech verb: koledovat) and were not limited just to Christmas. Now, they can be heard in homes around the country, they come on radio and appear in shopping malls and elevators. Here are several links to Czech carols online (link1, link 2, link 3).