An open datebook.
datebook definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a notebook for entering upcoming social or business appointments, birthdays and anniversaries, etc.
datebook definition by American Heritage Dictionary
A notebook or calendar for listing appointments, events, and other work-related or social information.