A diary is a schedule book (British English: Diary, American English: Appointment book). It is a stationery item, also called a "diary".

A schedule is a small book with the schedule as the main part.

The schedule is arranged in the order of year, month and day, and the schedule for that day can be recorded in the blank space of each date.

Some planners also have a special place for taking notes on each page.

A notebook can contain annual + monthly + weekly plans, daily records, work/study notes (daily tasks, projects, meetings, etc.), and life records (such as income and expenditure, excerpts, ideas, etc.).

There are many ways to use the handbook, which vary from person to person.

Usually the first and last pages of the schedule contain practical reference information such as maps and telephone area codes, as well as calendars, address books, etc.

Extended information If you want to make an appointment with a Japanese friend to go out to eat or travel together, the other person will usually take out a small notebook, turn to a certain page, and quickly write down the agreed time and place.

On the subway, you can often see someone taking out a small notebook from their bag to read or record.

This kind of notebook is called a "handbook".

From the reporter's point of view, the notebook is actually a notepad.

Most handbooks come with a calendar and pen, and you can hold some business cards and pieces of paper. Different page divisions have functions to meet different types of needs. For example, housewives’ handbooks have a special place for pasting invoices, recording income and expenditure, and helping them.

Live life on a budget.

Reference: Baidu Encyclopedia-Handbook