Datebook (noun)

1. A book or planner used to record and organize dates, appointments, and other events.
2. A book or calendar where one records dates and appointments.

Origin:

A compound of the words date and book, which refers to a book or planner used to record and organize dates, appointments, and other events.

Examples:

1. She always carries her datebook with her to keep track of her appointments.
2. He kept a datebook to remember important dates and events.
3. The datebook is filled with important business meetings and social events.
4. The datebook is an essential tool for anyone who wants to stay organized.
5. I always use my datebook to remind me of important deadlines and appointments.