Wall Calendars: These are typically large calendars designed to be hung on walls. They often feature monthly layouts with large date boxes and ample space for notes or images. Wall calendars can be themed (e.g., nature, art, animals) or customized for personal or promotional use.

Desk Calendars: Desk calendars are smaller than wall calendars and are designed to sit on desks or tables. They often include a stand or base for easy display. Desk calendars usually feature monthly or weekly layouts, sometimes with additional space for notes or to-do lists.

Planner Calendars: Planner calendars are designed for organizing daily tasks, appointments, and reminders. They often include hourly or daily breakdowns, to-do lists, and sections for notes. Planner calendars can be in book format or in loose-leaf form that fits into a binder.

Pocket Calendars: These are compact calendars designed to fit easily into pockets or purses. Pocket calendars typically have a smaller size, with monthly or weekly layouts. They are convenient for quick reference on the go.

Digital Calendars: Digital or electronic calendars are software applications that can be accessed on computers, smartphones, or tablets. They often synchronize with email accounts and other digital tools, allowing users to manage appointments, set reminders, and share schedules.

Advent Calendars: Advent calendars are used during the Advent season leading up to Christmas. They consist of a numbered sequence of doors or compartments, each concealing a small gift, treat, or message to be opened on each day of Advent.

Lunar Calendars: Lunar calendars are based on the cycles of the moon rather than the solar year. They are used in cultures that follow lunar calendars for religious observances, agricultural planning, or cultural events.

Financial Year Calendars: These calendars start from a different month than January (typically July or April) and are used for financial planning and reporting purposes by businesses, governments, and organizations.

Educational Calendars: These calendars are used in academic institutions and include dates for school terms, holidays, exams, and other educational events. They often follow the academic year from September to June.

Customized Calendars: These calendars can be personalized with photos, artwork, logos, or other custom designs. They are often used as gifts, promotional items, or for personal use with special dates or events highlighted.