A book or notebook with pages for each day or date where people write appointments, events, and reminders to organize their schedule.
Compound word from 'date' (a specific day) and 'book' (a bound collection of pages), combining these two elements to describe a scheduling tool.
Before smartphones, datebooks were status symbols—the size and quality of your planner literally showed how organized and important you were, which is why leather-bound organizers were so prized.
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