"Calendar Day: A workman takes off one collar, a second workman takes off two collars, and after a winter, the armor is not half a collar." What is "Calendar Day"? Tingyin: It's a calendar. What's "a workman's collar"? Yi-Shek: One day, one tear, one winter? A year, huh? That's great. Take out the new calendar for the year 101 and the current calendar for the year 100 and let them observe and compare them to understand the meanings of the lyrics. Most of the children in the older classes understood the words, while those in the middle class seemed to understand them, and those in the younger classes heard nothing, though they didn't understand them.