Can you tear only one calendar?

Calendars cannot be torn up one by one. You can tear up the calendars one by one, or you can clip up the used pages first and tear them up when you are finished. The prototype of the calendar is a debt collection book. With the passage of time, the debt collection book has gradually evolved into today's calendar. Calendars are gradually evolved from imperial calendars, calendars and New Year pictures, and are works of art combining almanac and New Year pictures.