Whenever there are festive events, we like to sing some songs about these extraordinary events. Carol’s are suppose to be joyful songs that have some religious link, most often it has some relation to Christmas. The main feature of a carol is repetition more often or not chorally or musically, repeating like a circle. The word carole entered the English language from the French language at the dieing end of the 13th century. Anciently a carole was a ring dance around a circle, where men and women held hands and danced & sang around the circle.
Most of the time these carols are sang at Christmas parties but there are quite a few Easter carols too. There are some advent carols out there too. So if you’re quite the festive type, you might like to look them up.