She calendarizes all the important events.

She is calendarizing all the upcoming events.

The calendarers are responsible for organizing and scheduling events.

The calendarer meticulously plans and organizes the events for the entire year.

The calendaric system used in ancient civilizations was based on the movements of celestial bodies.

I bought three Advent calendars for my kids.

Lunar calendars are used in many cultures to track the phases of the moon.

Solar calendars are used in many cultures to track the passage of time.

Many cultures around the world use lunisolar calendars to determine the dates of important events.

I have two diagonal calendars hanging on my wall.