挂历的雏形是一种“讨债本”。那是在古罗马时代,当时社会上有一种专门从事放债业务的人,按月去向债户收取利息。为方便起见,他们将何月何日某人该还的债和该付的息都记在一个本子上。 Calendars prototype is a “debt collection”. It was in Roman times when there was a community of people who specialized in money-lending business and paid interest on their debts on a monthly basis. For the sake of convenience, they will keep a copy of the book about the debt and interest paid by someone on what month or month.