Bookfriends Wirebound flip for both Perpetual desk calendar and D-Day desk calendar (Natural) Bookfriends Wirebound flip perpetual desk calendar by Bookfriends. Designed & Made in Korea Get your desk up to date with this calendar. You will never have to buy another calendar to keep track of the day and month. To change the date on the calendar simply select the date by flipping the attached tabs to the proper month, day of the week, and date. You can also use this calendar as a D-DAY calendar for counting days. Example : Study, Exercise, Anniversary, Wedding, Childbirth etc. Keep up until the D-Day of your test, travel, childbirth and so on! Size: 9.9" X 3.9" X 0.4" ; Made in Korea