These Colorful Calendar Days are versatile to use on any calendar chart.åÊ Pack contains 31 number days (designs form an ABC pattern), 2 combined number days (23/30 and 24/31) and 2 blank days for highlighting special events or holidays and recognizing birthdays. Calendar Days are great for use on a classroom calendar during the daily calendar lesson or circle time. They can also be used as student numbers to label cubbies, folders, desks, and more!