calendar

A calendar is an important tool that we see every day. It helps us check the date and day of the week and manage our schedules.

Calendar apps are widely used on smartphones. They are convenient because we can mark special days like birthdays or appointments and receive notifications.

The history of the calendar dates back to ancient civilizations. It was created by observing the changes of the moon. People needed to record seasons and dates for farming or religious events.

While digital calendars have become commonplace in modern times, paper calendars are still popular. Especially, idol calendars or calendars with artwork are used as interior decorations. Also, the tradition of many companies producing calendars as year-end gifts continues.